Series group order

Is there any algo how multiple custom groups get ordered on the Series page?
This page has a series that was published by multiple publishers, and each one has its own group, and the "Core" group is not used. I made one more group for the Ukrainian publisher, and now it's at the top for some reason.
I don't want that, it's an English series and translations shouldn't be on top. But I can't move it anywhere, I tried to change the books label, yet nothing changed. The groups are not alphabetically ordered, not chronologically ordered, not ordered by labels, I have no idea how it works here.
https://www.librarything.com/nseries/343872/The-Collected-Stories-Of-Philip-K-Di...

Look for an option on the right-hand sidebar (wide screens) or in the underneath menu (narrow screens) called "Edit Series", and then an option "Sort Groups". It can be set into whatever order you wish.

Welp, can't believe I never noticed it right under my nose. Thanks a lot.