First - Welcome to Mobilitysite. Lots of good info & ppl here.
Second - You may also want to check your BT and WiFi settings. I had that problem with my BT setup originally. If an appointment popped up the AX would stay on while it was connecting to the BT on my PC. Fortunately, I have my AX docked at home, so no battery loss. But, it was frustrating seeing it on when I knew it was off when I put it in the cradle. :exc: