Ok to start C and D are the same sat so if you are scanning one you are scanning the other as well. Next on the list of problems to overcome. The tp for Cubavision is the touchiest tp on the sat. Your dish is off a bit. Not much at all just a hair. Once you have the tp for Cubavision dialed in (peaked) for the sat all the other channels will be there.
I remember duelling with that sat well
along with trying to maintain signal on G10 on the other end of the arc plus everything in between. Drove me crazy for a bit. Had all of 30 and G10 except Cubavision. Get Cubavision and loose half of G10. Ah the fun of it all.
A little more patience and adjustment and you should be right on it.
Steve