Deployed printers deleted, but stay on session

Hi,

I have an infrastructure like that : 

- 2 AD
- 1 File server
- 1 print server
- 1 RDP server

I deployed printers on RDP sessions with print manager, with a gpo on RDP server. This solution was too slow to come at login and default printer didn't stay after logoff. I decided to stop the deployement via printer manager and install with a script (call \\printserver\printerName )

On almost all RDP sessions, the deployed printers stay in Devices and printers and I can't delete them, they come back after 10-20 seconds. I tried with admin and user account.

Some printers are good, and I can print, others not at all. Sometimes, if I print on printer1, it prints on printer2. That is not on all sessions. TCP ports are OK on printserver.

Is it possible to force delete the deployed printers?

I already tried gpupdate, gpupdate /force, reboot of all server, disconnect users.

Obviously, there is no printers deployed in printer manager.

Thank you for answer and sorry for bad English, regards!

Simon Gremaud