Question about units in Vizzy

I'm a bit confused about what units things return in Vizzy, specifiically when you use fUNk. For instance, I have a craft that the designer says is 139kg. In Vizzy, if I use the (performance: Mass) block, the value is 138.559, so that make sense, it seems to be kg. But if I use fUNk with the expression FligthData.CurrentMass, I get 1.386. So, it's in quintals? (1 quintal = 100kg, I looked up what it was called in a probably unsuccessful attempt to be amusing).
I've noticed that PropellerAssembly.Thrust is similar, it seems to be in newtons per 100 kilograms.
Am I missing something, or are the things you get from fUNk is strange units?