Alternator help

Just installed the new regulator. At first it didn't help. The battery was reating weak on the tester I let it charge all day yesterday. Now I drove to the shop with no issues.
Volt meter reads 12.90 - 13v on the alternator at idle. And when I Rev it, it seems to stop at around 15.40v

I tried cleaning bulk head connectors under engine bay. And checked with BATT- and red prong on ignition side of regulator. I am still reading 11.30v while battery reads 12.90 - 13v.
I even put a jumper from alternator stud to batt+ and still got the 11.30 reading.
Any ideas?