I really don't understand this...
If Cowen logout and you login then u shouldn't have this problem.... even if you are using the same computer...
You have to be doing something wrong... it have nothing to do with cookies and biscuitsĀ
...your computer will save your login but Cowen have to logout,,,, try again, next time make sure you log the person out frist and then login...
As I suggested to Cowen to change his password.....