The series of animations appear as a list in the animation list pane. One can drag and drop animations in the list to change the order.
However, it is impossible to simply move an animation item event to the top of the list by simply dropping is at the top of the list, as one would expect. When you do drop it at the top the dropped item becomes the second item in the list. Then, one must drag the 1st item below the second item to get the desired item finally at the top. Since this feature appeared this defect has been there. I keep hoping this would get fixed.