Another Charging Question

The ALT is a square back unit. So I ran a couple test under different conditions and here is what I got all warm.

Battery ALT
Running idle with lights off
13.6 13.9
Running off idle with lights off
13.8 14.2
Running idle with lights on
12.9 13.3
Running idle lights on in gear with foot on brake
12.2 12.5
Running idle and off idle ALT FLD grounded (top post of alt) with lights on and off.
12 12
So the ALT is bad?