When you add a new animation, it is placed at the bottom of the animations list. The only way to place an animation in slot, say, 2, is to either edit animation 2 to be the new one and place the old animation 2 at the end of the list, or do a lot of cloning. Either way, the level will be full of instances of the wrong animations. Drmoo (and I agree with him on this strongly) would like to be able to insert a new animation between two existing animations, rather than at the end of the list.