[aiharkness]

I suspect I don't understand everything you wrote. ... Keypad stacking?..... However, keyboard and button issues can be a broken or worn out action, or symptoms of liquid or moisture exposure. Not sure about the device getting warm and fast battery drain. That can be the device hitting the network a lot, an app running and putting high demand on the processor, hardware damage.....

If it were me I think I would be shopping for a new BlackBerry. See what others say.