G E Predator said:

Don't know of Ady would consider this, but a reason to back-up Leia remembering what little she does about her real mother could be that while she lived on Alderaan, her adopted father showed her holographic images of her mother from when she served in the Republic Senate. It would similarly to the deleted second from "Episode II" when Padme talks about her childhood friends who died and Anakin sees moving images of them on the wall of her bedroom.

I think this would work well.

I've always thought that a possible explanation of the discrepancy between ROTS and Jedi could be that Bail's wife, the one we see briefly with Bail and the baby at the end of ROTS, died at some point while Leia was growing up. He remarried, and Leia still believed that Bail and his first wife were her parents. But his remarriage would be a well-known thing, hence why Luke says "your real mother."