Everything is a mess

Hi.

I just logged in this morning to get greeted by a mess in my website, everything is in the wrong order ??

https://www.greenlandicnerd.com

I used to have all of my reviews in a tab where you can mouse over the header & click on a review to view it, now they’re all over the place.

I have non-existent knowledge of WordPress & tried to fiddle with the template & order etc to fix it, but none of it helped ??