Thanks for your reply pkaul. fyi I have just managed to make my channel list in MyTV complete. I went into MP Configuration/TV/TV Channel Groups/ Map Channels tab. All the channels were there on the left so I put them into their respective groups. I'm not sure if this was actually necessary, but I did it anyway.
I clicked OK then went into MP proper\TV\Channel The list was still incomplete. I then clicked Group. At the top of the list was All Channels so knowing I'd arranged things in the groups, I clicked the All Channels. All this did was close the Groups list.
However when I clicked the Channel button I found the list is now complete.
It is a pity the MP MANUAL which I have been so dutifully following is so incomplete about this (and many other) areas, else I may have been able to work this out earlier.
I clicked OK then went into MP proper\TV\Channel The list was still incomplete. I then clicked Group. At the top of the list was All Channels so knowing I'd arranged things in the groups, I clicked the All Channels. All this did was close the Groups list.
However when I clicked the Channel button I found the list is now complete.
It is a pity the MP MANUAL which I have been so dutifully following is so incomplete about this (and many other) areas, else I may have been able to work this out earlier.