Demo mode?

Hi, what for is demo (ST-901)? I tried to login, with ID of the unit and pwrd 123456 everyting OK, when I click in demo shows demo and a 4 points pwrd. Isn't supposed to be the same as the ID pwrd? How can I delete that unknown 4 caracters pwrd to replace by 123456?
I don't know if it is the reason, but I receive correct information in cellphone SMS and Google map, but in my pc, in www.sinotracking.com, I get a surreal location, I'm in western europe the car, in the map, is more then 1500 miles south, in the midle of the sea and the african coast...
Any way to reset everyting to the factory layout?
Regards