Its by design:
You have 2 sprite instances, same name, SAME PROPPERTIES. if you change propperties of 1, it changes the propperties of both those instances. (as in effect, they are 1 object, just has a copy about in the layout)
edit: in your example, each instance has one of the animtions set to 0, in effect, setting both instances their animations to 0.
If you clone an object, you get 2 sepperate instances, each needing a unique name.
If you change the propperty of one, it does not change the other.