I honestly think the problem was with the original alternator.....14.05 V was too low and Autozone wouldn't have replaced it unless they thought so too! Now that you're at 14.5 (which is about where it should be) everything is better. As far as the heater drain I'm sure I have a TSB on that somewhere and will see if I can find it.
I did have some question why the first new one ran at 14.05V and the second new one ran at 14.50V But the serious drops and continuing depletion of charge did not go away until I cleaned the IAC.. The car acted the same with the second new one on every test until I cleaned the IAC. But thanks for the advice. Now I just have a problem with an over load because when you put alot of load on the charging system the belt starts squealing real loud. I turn off the heater and it goes away. Thanks!