Taking my own suggestion, I've decided to do the very thing rougefemale used to insist upon: to start and maintain a single thread for an ongoing or recurring issue/problem/grievance/gripe. This doesn't rate "sticky" status as yet, because there's a very good chance the tech/s will be able to "cure what ails" the gallery software in this area very soon. But while it persists, there should still be a single thread for the issue, imo.
But let's try and keep the arrow pointing forward on this topic, and everyone sufficiently informed.
If you have had problems reordering images in galleries, please make note in your posts of:
1. The browser name and version you're using to do the reordering
(plus any notable "blocker" add-ons such as NoScript or AdBlockPlus)
2. The time of day (either in your timezone or as UDT/GMT)
3. The number of images in the gallery.
[4. - OPTIONAL - How recently the gallery was made or pictures were added to the gallery]
Mods: if you think this should be moved to Help & Support, do so.
BZT
Edit: Quite a bitflip for someone who originally called reordering "apologizing for a stupid idea in one feature with yet another feature", don't you think?