It is very helpful that each cue bank can have different control mappings.
Taking this further it will be even more helpful if media and layer controls can also be related to cue banks. For example if I am using a movie file in a quad and I want to be able to use a button to play and pause the clip with a particular cue bank changing the position of the quad with another set of cues.
Then in another cue bank I have a different set of cues mapped to buttons, in fact all of the buttons, and I don't want to accidentally trigger the play / pause button?