I want to create a longtable that spans several pages, with column widths set to cms by me:
\documentclass[12pt]{article}
\usepackage{longtable}
\usepackage{seqsplit}
\usepackage[a4paper,landscape,margin=1cm]{geometry}
\usepackage[utf8]{inputenc}
\begin{document}
\begin{longtable}{|p{3,53cm}|p{1,60cm}|p{0,80cm}|p{1,11cm}|p{1,16cm}|p{0,94cm}|p{1,11cm}|p{0,96cm}|p{0,57cm}|p{1,21cm}|p{1,04cm}|p{1,32cm}|p{1,26cm}|p{0,99cm}|p{1,27cm}|p{2,71cm}|p{1,41cm}|}
\hline
\textbf{ \seqsplit{one} } & \textbf{ \seqsplit{tow} } & \textbf{ \seqsplit{three} } & \textbf{ \seqsplit{four} } & \textbf{ \seqsplit{five} } & \textbf{ \seqsplit{six} } & \textbf{ \seqsplit{seven} } & \textbf{ \seqsplit{eight} } & \textbf{ \seqsplit{nine} } & \textbf{ \seqsplit{ten} } & \textbf{ \seqsplit{eleven} } & \textbf{ \seqsplit{twelve} } & \textbf{ \seqsplit{thirteen} } & \textbf{ \seqsplit{fourteen} } & \textbf{ \seqsplit{fifteen} } & \textbf{ \seqsplit{sixteen} } & \textbf{ \seqsplit{seventeen} } \\
\hline
\endhead
\hline
\seqsplit{aaaaaaaaaaaaaaaaaaaaaaaa@gmail.com} & \seqsplit{Jjjjjj} & \seqsplit{Ccccccccl} & \seqsplit{ttrrw} & \seqsplit{xxxxxxxx\ 83} & \seqsplit{ooooooo} & \seqsplit{2222\ rrrrrrr\ oo\ trr\ bbbbb\ bbbbbbb\ ttttttP\ -\ 2111\ eeeedsee\ prrr\ vvv\ ll\ eeeirrrr\ xxrrrttt} & \seqsplit{20/02/2011\ 11:39:37} & \seqsplit{0} & \seqsplit{0,00} & \seqsplit{0,00} & \seqsplit{07/07/2011\ 09:00:00} & \seqsplit{14/07/2013\ 11:00:00} & \seqsplit{700} & \seqsplit{4} & \seqsplit{xxxxooowwwaaaaaaaaapaaa/srsssssss} & \seqsplit{50,00} \hline
\end{longtable}
\end{document}
The problem with this tex is that I have seventeen columns, and the seventeenth appears out of the landscape page. However if we add the widths of the columns, is less than 23 cms. What's going on here?