Grid Layout Issue?

I’m trying to layout the url I linked below.

Problem: I can get the buttons to stick to the bottom fo the box, but i can’t get the words to stick to the top.

What’s the solution here? Should I crop all images before uploading so they have the same dimensions, or is there something I can do on the design side to clean it up.

Here is my site Read-Only: LINK
(how to share your site Read-Only link)