Red sqms has the tapestries falling into water, I guess you aren't supposed to put any there. But then shouldn't it be impossible to do so and if you can they shouldn't fall into water imo, specially with the risk of missclicking tapestries on the wrong wall.
The black circle the tapestry won't land on, same at bed at the north. However I guess this is a same sqm problem, aka only 1 tapestry per sqm. If you could clarify that for me.