Ok, I began watching Days in 1995 when Marlena was possessed. I distinctly remember that in July 1995, it was said that Marlena had NO memories of being possessed, with the one exception of throwing Stefano over the balcony. Well, today, it was revealed that indeed she does remember the possession. I thought I would point that aspect out, and wonder if perhaps I'm reading too much into this little fact.

Yeah, I noticed that too. It's probably just something they accidentally overlooked when writing the script or something.

Marlena didn't remember to begin with, but when John began to tell her about her deeds as the desecrator all of those memories came back to her. So she does remember, maybe not everything, but she does remember a lot.