From my (admittedly limited) testing so far it does indeed seem to be the case, my old chapter 13 file where I had Tifa c8, and Cait Sith and guys, I mean, why not c14, redo c8 with Aerith at 38% affinity, get her as c8 date, c14, yeah why not. So DA (dated Aerith) and DDA (didn't date Aerith)...