See the screenshot below.
00 deleteme 1.png
There is a left tab setting in your TOC1 style, for whatever reason, that is catching the page number. The other two entries have text past that stop and so it does not interfere.
Generating a Table of Contents - Complex Documents
TOC Tips and Tricks
How to attach a screenshot or file in this forum.
Edit: Sorry I wasn't explicit.
You need to change/modify the TOC1 style to remove the unneeded tab stop. As for why it might be there, my best guess is that you have the tab stop in an underlying style such as Normal.