Problem with a wide table which spans multiple pages

Question

I'm doing my PhD thesis, I'm new on LaTeX and I'm struggling with my tables. As seen here: https://i.stack.imgur.com/LL6sH.jpg my table spans two pages, but in the second page it doesnt align properly.

I already used tabularx, longtable and \setlength\LTleft{-1cm} but nothing seems to help, also read other Q&A about it, and the problem persists. I need my tables to span multiple pages, the table must be centered and the caption start at the left. The table is wide, but I need it to shrink it into a portrait layout.

I have the next code which gives me a table spanning two pages, but in the second one, the table doesn't align properly, it moved about certain pixels towards the right:

\documentclass[a4paper,12pt,times,numbered,print,index]{Classes/PhDThesisPSnPDF}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% PREAMBLE: Contains packages and user-defined commands and settings
\usepackage{booktabs}
\usepackage{ltablex}
\usepackage{dcolumn,tabularx,booktabs}
\usepackage{longtable}
\usepackage{pdflscape}
\usepackage{adjustbox} %para ajustar las tablas
\usepackage{ltablex}
\usepackage{textcomp}
\usepackage{siunitx}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% APPENDICES

\begin{appendices} % Using appendices environment for more functunality
\include{Appendix2/appendix2}
\end{appendices}


%%%%%%%%%%%%%%%%%%%%
%appendix2.tex file
\subsection{CSH table for peptide xxxx in xxxx mM DPC}
\label{table:CSH-xxxxx-DPC} 
\setlength\LTleft{-1cm}
\begin{tabularx}{\linewidth}{lllll lllll lll}
\caption{chemical shifts (ppm from DSS)  for peptide ----}\\  

\endfirsthead
 \endhead

\toprule
\multicolumn{2}{l}{\textbf{Residue}}   &
\textbf{HN}  & 
\textbf{ H\textalpha }& 
\textbf{H\textbeta}  &   
\textbf{H\textgamma }   &
\textbf{H\textdelta }   &
\textbf{H\textepsilon }     &   
\textbf{H\textzeta }   &
\textbf{C\textalpha  } 
\\[6pt]
\midrule


Arg &   845 &   7.37    &   7.37    &   7.37    ,   7.37    &   7.37    ,   7.37            &   7.37    ,   7.37    &   7.37        7.37    &   6.70    ,   6.57    &   56.76   \\


\bottomrule
\end{longtable}
\clearpage

Thank you

Answer 1

edit:

after your response i second review my answer again ... and find some glitches in code, which arise from not understanding of table context. now i suspect, that table actually has nine columns. in answer for document class i use book instead PhDThesisPSnPDF which i haven't.

you can use tabularx, but in this case at least one column had to be of X type:

\documentclass[a4paper,12pt,times,numbered,print,index]{report}%{Classes/PhDThesisPSnPDF}
\usepackage[showframe]{geometry}

\usepackage{booktabs, ltablex}
\newcommand\mcbf[1]{\multicolumn{1}{c}{\textbf{#1}}}    % <-- added

\usepackage{textcomp}
\usepackage{siunitx}

\usepackage[version=4]{mhchem}    % <-- added

\begin{document}
\setlength\LTcapwidth{\linewidth}  % <-- added
\keepXColumns                      % <-- added
\small                             % <-- added
\setlength\tabcolsep{5pt}          % <-- added 
\begin{tabularx}{\linewidth}{*{10}{X}}
\begin{tabularx}{\linewidth}{@{} X*{8}{l} @{}}
\caption{\ce{^1H} and \ce{^13 C\alpha} chemical shifts (ppm from DSS)  for peptide --- in \ce{H2O}/\ce{D2O} (9:1 v/v), \SI{30}{mM} DPC, pH 3.5, \SI{35}\degreeCelsius}\\
    \toprule
 \textbf{Residue}       &
\mcbf{HN}               &
\mcbf{\ce{H\alpha}}     &
\mcbf{\ce{H\beta}}      &
\mcbf{\ce{H\gamma}}     &
\mcbf{\ce{H\delta}}     &
\mcbf{\ce{H\epsilon}}   &
\mcbf{\ce{H\zeta}}      &
\mcbf{\ce{C\alpha}}   \\
     \midrule
\endfirsthead
% table headers on the next page
\caption{\ce{^1H} and \ce{^13 C\alpha} chemical shifts \dots (cont.) }  \\
    \toprule
 \textbf{Residue}       &
\mcbf{HN}               &
\mcbf{\ce{H\alpha}}     &
\mcbf{\ce{H\beta}}      &
\mcbf{\ce{H\gamma}}     &
\mcbf{\ce{H\delta}}     &
\mcbf{\ce{H\epsilon}}   &
\mcbf{\ce{H\zeta}}      &
\mcbf{\ce{C\alpha}}   \\
     \midrule
\endhead
    \bottomrule
\multicolumn{9}{r}{\footnotesize\itshape continue on the next page} % <-- added
\endfoot
\endlastfoot
%%%% table body
Arg 845 &   7.37    &   7.37    &   7.37, 7.37    &   7.37, 7.37    &   7.37, 7.37
    &   7.37 7.37   &   6.70, 6.57  &   56.76   \\
Arg 845 &   7.37    &   7.37    &   7.37, 7.37    &   7.37, 7.37    &   7.37, 7.37
    &   7.37 7.37   &   6.70, 6.57  &   56.76   \\
% ... 
    \bottomrule    
\end{tabularx}

\end{document}

this code need to be compiled three times that it obtain correct form.

• changes in code are indicated by % <-- added.
• i suggest to use
  • mhchem packages for chemistry formulas,
  • siunity package for units.
• because the table is slightly wider than text width two measures are considered (if this is not the case with original document case, you can remove this change):
  • \small font size is used
  • reduced is distance between columns from default value of 6pt to 5pt

Answer 2

Thank you @Bernard and @Zarko, I finally found the problem:

I changed now to longtable and added the following lines:

\setlength\LTleft{-1cm}
\setlength\LTright{-1cm}
\begin{longtable}{lllll lllll lll}

%%%%%%content

\bottomrule
\end{longtable}
\clearpage