Vortech controller. How many pumps

I have tried over the years to assign 5 mp10 pumps. I can get 4 recognized but the next pump doesn’t show up on the pump list but does respond as if it is a number one pump. So any time the number one pump which is the master the pump copies all commands as programmed.Also the pump makes all changes that I make to pump one ......

Make sure you are running the current P3 FW.

Reset the pump's memory, then reassign it to the Vortech controller accessory.