[outerpip]

The way I've been explained Android works is when you are in a program, and you press the home key, it leaves the program, but leaves it active in the background. If you press the back key to return to the home screen, it puts the program in a "dormant" state, but not quite fully exited. As stated above, the only way to really exit a program is with a task killer, but even then, Android will sometimes re-open the program, especially depending on what program it is...gets annoying sometimes.