TD, welcome to the club!
You either have a drain or something in the charging system isn't working properly. Check for the drain with an ammeter. If there's no substantial current, then load test the batt and alt. Mark down the test results, and post them here if you'd like some response.
When we test it, it reads 14 on the machine which is good so this is why we are baffled. It just won't charge when the car is not moving.