I tried that scan, but found no channels. I will send photos tomorrow - my neighbour has been away, and left his van in a position where I could not get to the satellite!
I am beginning to think that the way to get most value from the Vu+ Duo will be to have coax cables going to both tuners (LNB 1, LNB2) with both satellites feeding into each cable, via two diseqc switches at the dish. If this is indeed the ideal arrangement, should I get that setup installed before continuing to resolve my problem of getting channels from only one satellite at a time? (Just as a reminder, I have a 1000mm dish, pointing at 16E, with an offset LNB for 28.2E.)
To get the most, out of your receiver, it would be best to motorize it, so you can get most satellites between 46E to 30W.
If using a fixed dish system then you can use twin LNB's, 2 outputs, and run different cables, to each tuner, each with a separate Diseqc switch, allowing each tuner to receive all the channels independently so that you can record, and view, multiple channels.
In one of your posts, earlier in the thread, you said you were getting channels, from the 28.2E LNB, but now you're not. If the LNB is setup correctly it might just be a faulty Diseqc switch, that's causing the problems.
If possible can you run a cable directly from the 28.2E LNB, to your receiver, then see if you can scan in any channels.
Once you are able to take some pictures, of your dish, and LNB's, please post them.