I noticed in your first post that you have a quad LNB connected to your dish,have you checked that you get the same result from all 4 outputs on it???
If you have two separate cables coming in from the LNB then try this on your tuner config: ( I am using 28.2E as a example)
Tuner A
Configuration mode: Simple
Mode : Single
Satellite : 28 east
Send Diseqc: yes
Tuner B
Configuration mode: Simple
Mode : Single
Satellite : 28 east
Send Diseqc: yes
