Multiple Bugs (part 1)
I assume pictures show up by default in the order I uploaded them.
Bug 1: This block placement should not be possible. I didn't do any glitching, this is simply possible for some reason. Blocks involved: Large Round Battlement, Small Round Ledge Platform.
Bug 2: Sadly, I don't know how it happens, but it is quite common. It happens at least once per session. Some blocks get a red outline and stay that way for the rest of the session. Sometimes happens to flora as well, but they get white outline.
Edit: I reproduced it multiple times. Doesn't always work, but it causes it. How to do it: I picked a multiblock (seems like it only happens with these), aimed at the top of a block (where it is unable to place), then aimed at a block, which is a different block, but we still have the outline on the previous block, then switched to empty hand or 0. I attach images.
Bug 3: Just a tiny grammar error. "Melt a rusted sword into metal parts" should be the right replacement.