I have Advance Task Killer installer to close apps to keep my Motorola Droid from running slow. I open the app and apps I have not used are running according to ATK. I have all the apps checked, I hit "kill selected apps". The app closes. I open the app again immediately and there will be a couple of apps running. I repeat the process and hit "kill selected apps" and still I will have a few different apps running. What is going on?