Overcharging 16.0v

Not sure whats going on. Here are some of my voltage readings.

Battery 16.0v
back of alt 16.0v
one field wire 14.8v at reg
one field wire at reg 10.5 v

all with car running. I installed a new regulator. The alternater has very low run time. It is a chrome powermaster amp is unknown. I also put a amp clamp around the neg cable and im only reading 12.0amp. I put it around the pos cable and Im reading 3 amp? I am a bit confused as how this system works. Any insight or help would be appreciated.