OK, I'm an incurable dog nut. I sometimes fantasize but not in reality. Our latest adoption was a 100# Rottweiler. It's been over a year but it's been obvious she had a good home and still remembers. ...
You're not "wacko" and she seems to be able to clearly communicate with you. Maybe you should tell her that you don't know where she lived - and she'll have to stay with you now. Forever. Maybe she's just wondering when she's going to be looking for the next home?? My daughter adopted a Chow/Golden mix, and it took him a LONG time to accept them as "his" family.