Why are my sections titles smaller than the subsections'?

Question

On the table of contents it's all right, but in the document, not so good..

Here's my code:

\title{Lab Eletrônicos I - Relatório Cap 1}

% essa 1a parte vc nao precisa saber, só copiar e colar


\documentclass[12pt,twoside]{article}
\usepackage{tabto}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{ae}
\usepackage{float}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{graphicx}
\renewcommand{\rmdefault}{phv} % Arial
\usepackage{setspace}
\renewcommand{\baselinestretch}{1.5}
\usepackage[num]{abntex2cite}
\usepackage{booktabs}
\setlength{\parindent}{1cm}
\usepackage{siunitx}
\usepackage[portuguese]{babel}
\usepackage{fancyhdr}
\usepackage{hyperref}
\usepackage{caption}
\usepackage{pdfpages}
\usepackage{enumitem}
\usepackage{flafter}
\raggedbottom

\fancypagestyle{plain}{%
    \fancyhf{}
    \fancyhead[R]{\thepage}
    \renewcommand{\headrulewidth}{0pt}
}
\usepackage{titletoc}
\usepackage{indentfirst}
\usepackage[top = 3cm, bottom = 2cm, left = 3cm, right = 2cm,asymmetric]{geometry}
\AtBeginDocument{\renewcommand{\contentsname}{\centerline{Sumário}}}
\AtBeginDocument{\renewcommand{\bibname}{Referências Bibliográficas}}
\usepackage{titletoc}
\usepackage{titlesec}
\titleformat{\chapter}
{\normalfont \titlefont \bfseries}{\thechapter}{1em}{}
\titlespacing*{\chapter}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}
\dottedcontents{chapter}[1.5em]{\bfseries}{1.3em}{.6em}
\dottedcontents{section}[1.5em]{\bfseries}{1.3em}{.6em}
\usepackage[num]{abntex2cite}
\citebrackets[]
\newcommand{\titlefont}{\fontsize{14}{20}}
\newcommand{\sectionfont}{\fontsize{12}{20}}
\titleformat{\section}
{\normalfont \sectionfont \bfseries}{\thesection}{1em}{}
\dottedcontents{section}[3.3em]{\bfseries}{2em}{.6em}
\renewcommand{\figurename}{Figura}
\renewcommand{\tablename}{Tabela}
\usepackage{chngcntr}
%\counterwithout{figure}{chapter}
%\counterwithout{table}{chapter}
\usepackage{multirow}
\usepackage{titlesec}
\usepackage{multirow}
\providecommand{\keywords}[1]{\textbf{{Keywords:}} #1}
\providecommand{\palavraschave}[1]{\textbf{{Palavras-chave:}} #1}
\usepackage[normalem]{ulem}
\useunder{\uline}{\ul}{}

%\input setbmp

%começa de verdade aqui



\begin{document}
    \begin{titlepage}
        \center
        {\large UNIVERSIDADE DE SÃO PAULO}\\ \large ESCOLA DE ENGENHARIA DE SÃO CARLOS\\DEPARTAMENTO DE ENGENHARIA ELÉTRICA\\%[2cm]

\\

        {\Large \bf RELATÓRIO - CAPÍTULO I}\\
        {\large \bf SEL 0316 - Laboratório de Circuitos Eletrônicos I}\\[8cm]
        São Carlos\\
        2017    
    \end{titlepage}

\newpage

\tableofcontents 
\listoffigures
\listoftables
\newpage

\section{Introdução}
Introdução que vc queria

\section{Resultados e Discussões}

\subsection{Circuitos Retificadores}

\subsubsection{Circuito Retificador de Meia Onda}


Foi construído o circuito retificador, mostrado na figura:

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{fig15.png}
\caption{Circuito Retificador de Meia Onda}
\end{figure}

Aplicando na entrada um sinal senoidal com tensões de pico iguais a 0.5 V e 5 V, foi observado os seguintes comportamento na saída:

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1_1_500_mV.png}
\caption{Sinal de saída com 0.5 Vp na entrada}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-1_5V.png}
\caption{Sinal de saída com 5 Vp na entrada}
\end{figure}


\subsubsection{Retificador de meia onda com transformador na entrada}

Foi montado o circuito da figura abaixo:

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{fig8.png}
\caption{Retificador de onda completa usando transformador com derivação central \it(“center tap”)}
\end{figure}

Tendo a saída do transformador um valor RMS de 12 V\textsubscript{RMS}. Variando o valor da resistência R\textsubscript{L}, foram obtidas as seguintes formas de onda na saída do retificador:


\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-2_-_50.png}
\caption{Sinal de saída para R\textsubscript{L} = 50 $\Omega$}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-2_-_100.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-2_-_220.png}
\caption{Sinal de saída para R\textsubscript{L} = 220 $\Omega$}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-2_-_470.png}
\caption{Sinal de saída para R\textsubscript{L} = 470 $\Omega$}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{1-2_-_1K.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$}
\end{figure}

Para cada um dos casos em questão foram medidas as componentes CC e CA do sinal de saída, mostradas na tabela abaixo:

% Please add the following required packages to your document preamble:
% \usepackage{booktabs}
% \usepackage{graphicx}
\begin{table}[H]
\centering
\resizebox{0.7\textwidth}{!}{%
\begin{tabular}{@{}|c|c|c|@{}}
\toprule
\textbf{R\textsubscript{L} [$\Omega$]} & \textbf{Componente CC {[}V{]}} & \textbf{Componente CA {[}V\textsubscript{RMS}  {]}} \\ \midrule
\textbf{50} & 5,6 & 6,8 \\ \midrule
\textbf{100} & 5,9 & 7,3 \\ \midrule
\textbf{220} & 6,0 & 7,4 \\ \midrule
\textbf{470} & 6,1 & 7,5 \\ \midrule
\textbf{1000} & 6,1 & 7,5 \\ \bottomrule
\end{tabular}%
}
\caption{Componentes CC e CA do sinal de saída}
\label{my-label}
\end{table}

A mesma montagem do circuito foi utilizada, agora com capacitores na saída, a fim de que seja observada a influência deste no sinal. Foram utilizados os resistores de 100 $\Omega$ e de 1 k$\Omega$.

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_100_-_47.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$, C = 47 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_100_-_100.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$, C = 100 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_100_-_220.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$, C = 220 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_100_-_470.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$, C = 470 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_100_-_1000.png}
\caption{Sinal de saída para R\textsubscript{L} = 100 $\Omega$, C = 1000 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_1k_-_47.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$, C = 47 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_1k_-_100.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$, C = 100 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_1k_-_220.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$, C = 220 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_1k_-_470.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$, C = 470 nF}
\end{figure}

\begin{figure}[H]
\centering
\captionsetup{justification=centering}
\includegraphics[width=\textwidth]{124_-_1k_-_1000.png}
\caption{Sinal de saída para R\textsubscript{L} = 1 k$\Omega$, C = 1000 nF}
\end{figure}



\subsubsection{Retificador de onda completa com transformador na entrada}

\subsection{Reguladores de Tensão e Dobrador de Tensão}

\subsubsection{Regulador com diodo Zener}

\subsubsection{Dobrador de tensão}

\subsubsection{Regulador de Tensão Empregando Circuitos Integrados LM78XX}

\section{Conclusão}

\end{document}

Answer 1

@Schweinebacke's comment for this kind of mistakes: If you have a problem, always minimize your code. This will show you, where the problem stays and often also which preamble code can be removed without worsening the result and sometimes even which code should be removed because this will improve the result and already would be the solution.

My comment: I don't think this answer will help anyone else. It is just a common mistake of some new latex users (to copy-paste code that doesn't really know what it does) and the answer is not really related with the title of the question for other users.

The solution was to remove lines:

\titleformat{\chapter}
{\normalfont \titlefont \bfseries}{\thechapter}{1em}{}
\titlespacing*{\chapter}{0pt}{3.5ex plus 1ex minus .2ex}{2.3ex plus .2ex}
\dottedcontents{chapter}[1.5em]{\bfseries}{1.3em}{.6em}
\dottedcontents{section}[1.5em]{\bfseries}{1.3em}{.6em}
\usepackage[num]{abntex2cite}
\citebrackets[]
\newcommand{\titlefont}{\fontsize{14}{20}}
\newcommand{\sectionfont}{\fontsize{12}{20}}
\titleformat{\section}
{\normalfont \sectionfont \bfseries}{\thesection}{1em}{}
\dottedcontents{section}[3.3em]{\bfseries}{2em}{.6em}

since there was not reason to be there (it was just an unneeded copy-paste).

The code has also many multiple called \usepackage with the same package that probably return some warnings that the OP has to pay attention.