I see the usefulness of having two skeletons for some projects, its just so weird that its the ONLY option that I can find! Its super difficult to have an animation right there, all done, that I have to re-animate because:
A.) its in a different spine file
B.) you can't copy paste animations from one file to the next
C.) you can only import onto a new skeleton which doesn't work if you need these two animations to be attached.
Also is there a way to have two spine files open at the same time?