Hi Hipster,
thanks for the bug report and positive feedback, there aren't many gaming communities out there where you would get both!
Other people are seeing the random glitches you are seeing too, so it's definitely not you mistaking the game mechanics. I was hoping 1.7 would clear most of them up, but ah well, I guess 1.8 is coming along soon then :-)
Glad you're enjoying it. The game doesn't get really hard until after Zone C, hope you still enjoy it then :-D