It looks like just snapping works. You would want View/Snapping/Snap to Objects.
This reminds me, I've been meaning to submit a bug/feature request regarding the essentially random behavior of the align function when used with two objects. Sometimes it moves A to B, sometimes B to A, with no consistent logic to it.
Thanks Colin! I appreciate it.
For the last 17 years Flash has always seemed buggy to me...:0)
The Align one object to another object works with left, right, bottom & top, if Animate's logic is used. ie. whichever object is further left will stay put when align to left is used.