InDesign 2021

Background: I'm working with an InDesign Template file that was set up with two pages (not facing) and a lengthy table in a text box.

Issue: Whenever I thread my text box with the table it contains, the table over stretches the margins on only the additional/threaded pages. It remains within the set margins on the original pages, and if you try to adjust the table on the overset pages, it shirks it on the original pages as well.

Why is this? Why is the table changing size (width wise) on only the threaded pages, and how do I correct the issue?