Animation and Posing Undo

When animating there are a few issues currently that I noticed. When it comes to rigging and setting the position, I found that doing the undo shortcut completely undoes everything. Like if I was to pose the model by each thing, but wanted a certain finger or something back in the previous position it was in before I moved it, attempting to undo it takes everything I had done previously and resets it. It's kind of like I pushed ALT+G, R, and S at the same time.

Another thing I found was when animation and keyframing came into it. I was animating a jump when I wanted to drag a node from one spot to another to extend the jump. When doing it, I noticed nothing new. So I made it even longer, and longer, when I just noticed that no matter what, it wouldn't change. I tried both in the timeline as well as the dope sheet to make a difference in timing between keyframes to no avail. Thanks for reading. If anyone also knows how to rotate on a local axis, I would appreciate that as it's hard to pose fingers and other body parts on the global axis.