This page might help: https://forums.adobe.com/thread/869959
It can be a bit tricky to figure out at first, but the logic of it is simple, once you get the hang of it. It might actually help to draw out the actions on a piece of paper, to see where things might be going awry.
I hope this helps,
Thank you Brian. The computer never lies! It was user error, although very subtle! Glad I hung in there to figure out... it was a silly mistake. Thank you for the encouragement!