Okay, my car went in today to get the AC and the 3rd brake light gasket taken care of. Keith said there were about six cars that reported the same problem (gasket). The result? They fixed the gasket but can't find the AC leak.
So, on March 29 - added refrigerant / dye, Sept. 18 - added more refrigerant / more dye. Let's hope it makes it to the annual service before it needs to be recharged.
And, I took a closer look at my battery cover. It's really not warped; it's just that one of the fasteners doesn't screw in as well as it should so one end of the cover sits high.