I encountered this automatic logging out hullaballoo when griffin changed the service provider. BUt yeah, asked this as well way back , no one seems to have encountered it ( i guess they all were ticking the box without thinking that was the key to it) back then. After several step by step tracing of what I'm doing or not doing, Ive finally deduced that it's the remember me button, that made the difference. Hopefully it helps others as well in the future.