Observation with NoteEntry and "Add Staff Below/Above to Selection"

The user is allowed to "Add staff below/above to selection" while in note-entry mode. Usually I'm all for adding abilities, but here it doesn't make sense and seems that it should be locked out while in note-entry mode. Any reason why it should be allowed? It's a defined shortcut, again, under "Add staff above/below to selection", or it's also the default [SHIFT+UP/DOWN]. This could be confusing especially to a new user who accidentally does this and doesn't know what is happening. Of course the user can't do [SHIFT+LEFT/RIGHT] in note-entry, but again, why be able to do [SHIFT+UP/DOWN]? Maybe there is a reason and I'm overlooking it?

Of course these are minor suggestions, but for the sake of further definition/limitation/and function. . .