Tvheadend

hi all,

I would like to ask some assistance for the following issue: I have a setup with 7 tuners (a HDHomRun, a Hauppauge dualHD and a TechnoTrend AG TT-connect CT-3650 CI). I want to accomplish the following: for the channels on the CT-3650 CI I want the programs to use the CI card as opposed to OSCAM. currently the provider has multiple CA PIDS. One is Nagra 1801 which is handled by OSCAM. The CI Cam is an Irdeto and i would like that channels received on CT-3650 CI to use the CI CAM exclusively and not OSCAM.

What I have tried so far:
1. Forcing the CA PID on the program -- see the settings_channel attachment
2. Creating a CA Stream filter with EXCLUSIVE on the Irdeto PID and IGNORE on the Nagra PID. -- CA filter attachment

Whatever I do seems to always choose OSCAM over the CI. If I disable OSCAM then it uses the CI.

Can you please direct me towards what I might be doing wrong? Or figure out a way of setting CA priority based on tuner?