Why biblatex change cite numbers?

Question

I wants to cite my document in latex(overleaf). and I used biblatex . but then i saw after compiling it's numbers changing in wrong form and one of them disappearing.

\documentclass[12pt,onecolumn,a4paper]{article}
\title{hw3}
\author{alisafarpoor1108 }
\date{May 2020}
\usepackage{graphicx}
\pagenumbering{roman}
\usepackage{biblatex}
\addbibresource{lib.bib}
\begin{document}
\begin{figure}
\centering
    \includegraphics[width=\textwidth,height=\textheight,keepaspectratio]{images/nemad.jpg}
\end{figure}
\vspace{2cm}
\title{Third Homework} 
\author{
IUST
\\
}

\pagebreak
\date{\today}
\maketitle
\pagebreak
\tableofcontents
\pagebreak
\listoffigures
\pagebreak
\pagenumbering{arabic}
\section{CRITERION}
salam\cite{1}\cite{2}\cite{3}\cite{4}\cite{5}\cite{6}\cite{7}\cite{8}

\medskip
\printbibliography
\end{document}

and my lib.blb is:

@article{1,
  author  = {M. Xi and L. Chen and D. Polajnar and and W. Tong}, 
  title   = {Local binary pattern network: A deep learning approach for face recognition,},
  journal = {IEEE International Conference on Image Processing (ICIP)},
  year    = 2016,
  pages   = {3224-3228},
}
@article{2,
  author  = {J. Deng and J. Guo and N. Xue and S. Zafeiriou}, 
  title   = {ArcFace: Additive Angular Margin Loss for Deep Face Recognition,},
journal = {IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)},  
  year    = 2019, 
  pages   = {4685-4694},  
  note    = {An optional note},   
}  
@online{3,  
  author = {O. Kharkovyna},
  title = {An Intro to Deep Learning for Face Recognition,},
  year = 2019,
  url = {https://towardsdatascience.com/an-intro-to-deep-learning-for-face-recognition-aa8dfbbc51fb},
  urldate = {2020-03-30}
}

@book{4,
  author    = {X. Jiang and A. Hadid and Y. Pang and E. Granger }, 
  title     = {Deep Learning in Object Detection and Recognition},
  publisher = {Springer},
  year      = 2019,
  isbn      = {9811051518}
}

@article{5,
  author  = {P. S. Chandran and N. B. Byju and R. U. Deepak and K. N. Nishakumari and P. Devanand and P. M. Sasi}, 
  title   = {Missing Child Identification System Using Deep Learning and Multiclass SVM,},
  journal = { IEEE Recent Advances in Intelligent Computational Systems (RAICS)},
  year    = 2018,
  pages   = {113-116},
}

@article{6,
  author  = {J. Yu and D. Ko and H. Moon and M. Jeon}, 
  title   = {Deep Discriminative Representation Learning for Face Verification and Person Re-Identification on Unconstrained Condition,},
  journal = {IEEE 25th International Conference on Image Processing (ICIP)},
  year    = 2018,
  pages   = {1658-1662},
}

@article{7,
  author  = {J. Zeng and J. Zeng and X. Qiu}, 
  title   = {Deep learning based forensic face verification in videos,},
  journal = {International Conference on Progress in Informatics and Computing (PIC)},
  year    = 2017,
  pages   = {77-80},
}

@article{8,
  author  = {D. Voth}, 
  title   = {Face recognition technology,},
  journal = {IEEE Intelligent Systems},
  year    = 2003,
  pages   = {4-7},
}

but in output i see like the image with wrong citation. for making it simple I removed most parts but remaining that is here is still wrong.

'''