Android : Game Loop Is Not Destroying

Background I have created a game loop to run the UI, but when I push the back button from the game screen (SingleGameActivity) I get to the level-selector menu called (StartLvlActivity). If I try to reenter the game or push the back button from StartLvlActivity I get a keyDispatchingTimedOut error (ANR). When I wrote Log messages, the game activity (SingleGameActivity) was only paused, not stopped when I pushed the back button. And the game loop was never destroyed when I closed the activity.

08-03 09:56:12.130: I/Process(346): Sending signal. PID: 5763 SIG: 3
08-03 09:56:12.130: I/dalvikvm(5763): threadid=3: reacting to signal 3
08-03 09:56:12.333: I/dalvikvm(5763): Wrote stack traces to '/data/anr/traces.txt'
08-03 09:56:12.341: E/ActivityManager(346): ANR in com.coderogden.pongtennis (com.coderogden.pongtennis/.activities.StartLvlActivity)
08-03 09:56:12.341: E/ActivityManager(346): Reason: keyDispatchingTimedOut

Questions 1. Why isn't the game loop destroyed when I push the back button from the game menu? 2. How do I access "/data/anr/traces.txt" 3. How do I handle the errors?

If you can answer any of these questions I would appreciate it very much!