I don't believe I've had any other issues prior to this. Now I'm assuming that not all of the puzzles need to be done in order, although there are some prerequistes for a few. I believe after researching and obtaining level two in Restoration is when the bath was completed. And yes, there were plans drawn on the chalk board, and completed. It's just for some reason, when I put a villager there later on, (just to see what would happen) the plans for the bath came up again. And now I've recently fully researched Restoration, but I still have the plans for the bath up.