I am sent back to the login page all the time when I log in, why?

This may be due to the wrong date and time zone being set on the device. What date and time zone have you set yourself to? You see this under Settings > General > Date and time. You can choose to have the device automatically set date/time or you can set your own date. If you set your own date and that date is more than a year in the future our apps won't work, they expect the app to get today's date and time.