Liz, I too agree that it may well be her. I have come across the problem of the wrong male/female listing a couple of times over the years, so yes, it happens. Also have found a couple of instances of black/white transpositions. And unusual spellings that could be slightly illegible handwriting, a censustaker trying to spell an unfamiliar name phonetically, or just simply had their minds preoccupied with too much info and wrote down the wrong thing. I've come across all these in checking census listings for ancestors.
That being said, I would recommend going ahead and listing the two seperately as there is no way at present to be entirely sure. Detail the question of identity in a Research Notes section in both profiles. I have one now I'm working on where the 1850 and 1860 censuses each appear to have a daughter under totally different names but the same birth year. I believe they are the same daughter but will do two profiles with notes about the possibility of them being the same. It will keep it in mind for future researchers who may find a hidden source.
Just my two cents. Good luck!