I just removed a tub from my bathroom in preparation for a new one. I noticed that between the two layers of subfloor where the hole for the drain is that there was a thin paper lining the two. My house was built in 1928 so I am wondering if it contains asbestos. Or, is this just some form of vapor barrier. Anyone encounter this?

I was trying to replace my chrome recessed soap dish in my tub and found mold behind it, I also inadvertantly removed 5 or 6 tiles in the process which also had mold behind them. I cannot take on the job of removing and replacing all of the tiles (they surround the tub and go up about 3/4 of the wall) so I am going to try and dry the area, recaulk and hope that I can contain the problem, the tile is in excellent shape. I have tried to soak the tiles that I removed (they were set on some type of paper backing) to clean them, but I don't know how to remove the adhesive that was originally used. What should I do? All I was originally trying to do was clean an old tub and paint the walls. Please help!