It was clearly meant to be Janice in STIII they just ret-conned her rank. They did the same to O'Brien. I can live with it.
And glam make-up or not, Grace looked good in TMP IMO. Too much glam make-up on an older woman doesn't look as good to me. In Basic Instinct 2 Sharon Stone was caked in so much make-up it looked a bit odd. Shortly after I saw her talking with Dev Patel on a red carpet beaming away, wrinkles and all and she is still incredibly beautiful without the make-up.