I think the issus with "Channel I get" now is due to MLB-EI preview opening up a bunch of RSN that people normally don't get. Plus it has an existing bug where the alternate RSN channels show up in the "Channel I get" when they should be. You might want to check again after the preview ends.
As for saving, you need to create a favorites and select add "All I Get" and then go and edit out the stuff she really doesn't get.
Actually this is much better then what it used to be, it's better but they still have a way to go with it. IIRC it's been a fairly large undertaking to fix this since it goes back to the basic design of the guide data.
MSG carries the Knicks, Rangers, Devils, Islanders and Sabres thus have that many MSG Channels. Granted it is MSG, MSG + and MSG A. Since they each have their own HD and SD signal you get six.