Drag & Drop: Incorrect Answers Display Over Correct Ones?

Good afternoon!

I was wondering if there is a way for an incorrect answer to display on top of a correct answer when doing a drag and drop. Each time that an incorrect answer is placed back it may fall behind a correct one, obscuring it and making it more difficult for the learner to find it again. I attempted to reorder the images on the timeline and that did not seem to fix it.

I'm sure it's something simple I've overlooked and certainly hope anyone can lend a mouse... :)