Shared Printers sticking in roaming profiles

[Ripleys]

Morning Folks,

 

I am having an issue with some of our pupils roaming profiles. I have a GP in place to "replace" shared printers to pupils depending on the workstations they log on to (classroom(OU)). For the most part it appears to work however, we do have the occassional pupil popping up with printers from, art, business etc. I tell them to log off and back in again and that also seems to work. But I still get a teacher every now and then bringing print outs from different classrooms. I have a Delete all shared printers at the beginning of my preferences along with unmapping all ports. My replace printers have "remove if not applied" ticked too.

 

Is there anything else I am missing?

 

Cheers