Okay, how about this... What if you set a condition on the Mouse Enter action for tooltip 1 that says a variable, say, ObjectNumber, equals 1 and you set the ObjectNumber, without a delay, to the number of the object that your mouse is on by using a Mouse Enter action on each object.
So, for example, if I mouse over object 1, ObjectNumber = 1, but when I move my mouse onto object 2, ObjectNumber = 2 and, because there was no delay, by the time the tooltip action tries to fire on object 1, ObjectNumber already equals 2, so it doesn't fire at all. (This assumes that the condition is only evaluated after the delay passes, which I'm not 100% sure is true.)
