Yes, there's certainly something weird going on here. There's also this thread:
http://www.larian.com/forums/ubbthreads.php?ubb=showflat&Number=505407#Post505407 and another that I created by mistake in the general forum.
Furthermore, when changing the resolution setting, I'm only getting one item in the dropdown list which reads "Display 1 - Intel Integrated etc.". I'm pretty sure there wasn't a dropdown there before, and anyway, why is the system detecting only the integrated gpu? No other game seems to have this problem.
Specs: i7 4700 HQ, 765M, 16 GB RAM, Win 8.1