Maybe the important tl;dr for by-sa is that it allows reselling of that specific edit.
I have no idea about that and it was free on Open Game Art anyway. That was just the license I was told to ask about by Admin in order to unlock the post. There are so many licenses that I honestly don't understand the purpose of them all. The main points I got from reading the license page is the ability to use it as part of a commercial work and to attribute it properly.
It's a moot point in any case since I've already removed my edits of the animations and those who use my pack can pick this up and use it if they want to or make their own, whatever.
All your base material is licensed BY-SA and therefore it has to be that, yes. Two are solely BY-SA, otherwise they would allow to license under either BY-SA, GPL or both. That’s what original LPC used. (It was sponsored by the Free Software Foundation, the creator of GPL)
All licenses accepted by OGA allow reselling and commercial use.