Could be I wasn't clear (in previous post) due my limited english langauage...
Inside GUI, you already CAN save "Harvey, Phil" as SINGLE keyword. The problem is (or may be), this single keyword will be displayed the same way as if there were two separate keywords: Harvey AND Phil -you see in both cases "Harvey, Phil".
Actually the problem starts when you i.e. try to remove "Phil" only (not knowing "Phil" isn't separate keyword, but part of "Harvey, Phil" keyword).
Just noticed... probably this thread isn't about GUI at all... in this case, sorry for jumping in. Well, it's the same issue, though.