Thanks Agent73 for your input. I believe the tape may have shifted while in shipment - I did reach in and push it back down as best I could - it just seems like I can hear the tub hitting the tape strips when I remove the one tub.

Have you ever had to remove your probe from the heat tape - is it easy to remove without damaging the probe or the heat tape?? If it can be moved I might remove mine and move the probe a little further towards the left hand side so the tub cant possibly hit it.

I apologize for all my questions/concerns - I am brand new to using racks.