Title: Editing wall types seems to result in having both wall types at once
Summary: After the wrong wall type was selected when I was designing a house (see this report), I attempted to correct the situation in the edit tab of the building dialog. However, both wall types were then seen overlapping each other in the blueprint, and error messages were given. I ended up having to remove the entire building and build it anew.
Steps to reproduce: Probably just editing any old wall type will do the trick.
Versions and mods: No mods, latest release version in Steam at the time of writing, version 0.1.0 (release 110) according to the title screen.
OS: Windows 8 Pro 64 bits (6.2, build 9200)
Processor: Intel® Core™ i5-3450 CPU @ 3.10GHz (4 CPUs), ~3.5GHz
Memory: 8192MB RAM
DirectX-version: DirectX 11
Graphics card: NVIDIA GeForce GTX 660