Why does inclusion of titlepage mess up margin note placement?

Question

UPDATE: I managed to reduce the problem to the following (turns out it does not relate to classicthesis)

\documentclass[twoside]{report}

\usepackage{marginnote}`enter code here`
\usepackage{lipsum, showframe}

\begin{document}
\begin{titlepage}
   \lipsum[1]
\end{titlepage}
\pagenumbering{arabic}

\lipsum[1]
\marginnote{\lipsum[1]}
\lipsum

\end{document}

• If I remove \pagenumbering{arabic} it works
• If I remove the titlepage it works

How can I get both a title page, arabic page numbering and correct margin notes?

---

---

Original Question

I use the classicthesis package and desire to place marginnotes into the larger margin (it's a twosided document). Thus in my preamble I have

\makeatletter
\let\oldmarginnote\marginnote
\renewcommand*{\marginnote}[1]{%
   \begingroup%
   \ifodd\value{page}
     \if@firstcolumn\else\reversemarginpar\fi
   \else
     \if@firstcolumn\reversemarginpar\fi
   \fi
   \oldmarginnote{#1}%
   \endgroup%
}
\makeatother

Which places the note in the left margin for an even-numbered page, but the space is too large. See the below image

How do I get it into a reasonable position without messing up the format of the document (I tried some geometry related tips, but I wan all margins and such stay the way they are, and simply move the note closer to the body)?

Answer 1

As per my comment:

\documentclass[twoside]{report}
\usepackage{showframe}
\usepackage{lipsum}
\usepackage{classicthesis}
\addtolength{\marginparwidth}{0.5in}
\begin{document}
\chapter{One}
\marginpar{\rule{\marginparwidth}{1pt}}
\lipsum[1-3]
\chapter{Two}
\marginpar{\rule{\marginparwidth}{1pt}}
\lipsum[3-5]
\end{document}