The auto logout is set to something like 30 minutes. If you're like me and you have access to the web most of the day then you will want to update food and activities numerous times during the day. Every time you come back to the site after thirty minutes you have to log in again - what a pain!!!!!
I really wish that you would change it.
There are a lot of other people feel the same - though the thread is maybe on the wrong forum ..
Please help us .. ..