I've fixed and patch this. Please confirm if you can.
I am unable to reproduce this. Were your stacked floors in 'ghost' form or completed? What items did you place on the stacked floors?Ghosts of items placed on stacked floors stay red.
I am also unable to reproduce this. I'm not having any problems placing floors on 2x4x2 platforms.Floors can only be placed on 2 2x4x2 platforms, not with 1 of them under the center, but can be placed with a 2x2x2 platform under the center.
I also am unable to reproduce these issues.Ghosts of all posts I tried, with the exception of the Mason Yakitil Post, stayed red when placed on unfinished floors 0.5 meters above the ground and on a finished floor placed on the ground.
After I raised 1 of the floors with it's supporting platform and the post on top of them the post became yellow. Even after I lowered them again to 0.5 meters the post placed on it was yellow and stayed like that when moved to another floor at the same height.
Other posts moved on the raised and lowered floor stayed red.
All posts could be placed on a raised and finished floor although with the actual placing of some, for example the Banaya Weskiim Post, while standing on the floor the Banaya 4x4 truss under the floor got in the way.
Would you be able to set up these situations on the Test Server and give me a location to teleport to? I can then check these out personally to see what's going on.
Thanks very much for the tests!