Table of Contents not lining up

I can’t figure out how to get my ToC to be all in the same line vertically. No matter what I do, after I compile to .epub, the first chapter link is always further to the left and everything else under is indented to the right. I have attached screenshots. Can someone please help me out?? Thanks!

Screenshot 2020-05-12 01.40.40.png

What’s the structure of your Binder? Is the Introduction on the same outline level as the rest?