ahhh... I've been setting the multimeter to V~ 200, and it gave me 66-70V, when I set it to 700, it gave me 116V...
Regarding the bad power I'm not so sure anymore, only thing I have is a red light from the ups showing faulty wiring, I'd need an oscilloscope or something to find out, but with my gear it's not like I'll be able to tell the difference...