So I was mass changing galleries after Fandomdesktop happened to get them to have 250px and centered in the article space and captions centered (basically making mass edits like this (https://shakugan.fandom.com/wiki/Shakugan_no_Shana_Manga_Prologue?type=revision&diff=35588&oldid=34026):
<gallery widths="250" position="center" columns="2" spacing="medium" hideaddbutton="true" captionalign="center">
Flame_Haze.jpg|The Flame Haze.
Denizens.jpg|The Crimson Denizens.
<gallery widths=250px heights=250px mode="nolines" class="center">
Flame_Haze.jpg|<div style="text-align: center;">The Flame Haze.</div>
Denizens.jpg|<div style="text-align: center;">The Crimson Denizens.</div>
Now today I look at the page and though both look bad in editting previews, the former is now doing what I want and the FandomDesktop one I was changing it to is no longer centered. The text is also smaller.
So my question is did the galleries change and will the old Oasis gallery code I was using work from now on? This is very annoying.