Indeed not. I don't have it on the screen so this is from memory, but you get a dialogue box offering a yes/no option to search for new channels. If you are not watching as it boots up I guess you might miss the chance to do this. Does it default to search if you don't respond? Can't remember
Yes. Good point to remind people about. I imagine that all new installations will now have two F connectors on each wall plate. If you have a fairly old dish switching to a dual or quad will enable you to have a newer, lower-noise LNB fitted. Make sure you use good cable such as CT100.
Peter Scott