I was told it was a common problem, but couldn't find any threads with repair description or explanation of which part is actually broken.
Thanks.
This is last problem!!! Everything else is fixed!

 

Your AC system is probably short of gas. As the refrigerant flows across the evaporator, it runs out of cooling effect partway across. The flow of air is cooled on one side but not the other, so when it divides to go left and right the hot goes one way, the cold the other.

 

Gas point seconded. I had that issue in 2012, and everything went back to bone-chilling normal after having the system filled.

 

Thanks, guys!!! I feel better already!!!