Why does a particular gif for a Workshop wont work?

Left Side is my trimmed Gif (which doesn't work at all), Right Side is a downloaded gif online (this particular gif comes with all sets 1-5 which works)

This is what it looks like when I was trying to upload it and the console log...

And here's the comparison (2nd slot) which didn't worked the same as the others slot, those slot 1,3,4,5 were downloaded online, so what even is the difference?

Hello, I have a question, what you're seeing on the image is just a proof that they're the same dimensions, moreover I downloaded a full image gif, and divided it by trimming each till I have Gif 1-5 to slot on the Workshop.

So I uploaded that on the Steam Community Artwork upload online, as well as applying the code on the inspector > console:

$J('[name=consumer_app_id]').val(480);
$J('[name=file_type]').val(0);
$J('[name=visibility]').val(0);

The problem is when I try to attach/equip that said art to my profile it comes off differently, is there a particular reason it doesn't work? Any explanation?