Living near NYC, my daily commute has a few slow areas...along with some wide open stretches. I generally drive in "automatic", but use the paddle shifters to downshift rather than brake. I have noticed if I use the paddle shifter and then later in my trip let her out, she will not shift up, the beeping starts, and eventually the rev limiter actually kicks in. Sometimes 4th or 5th gear. This has happened in sport or regular mode. If I put it into manual then back to auto, it seems to reset. The point is, if I use the paddle shifters even once, this phenomenon seems to happen. Is this supposed to happen, defect in my car, or what?