I figured out the issue with the lost session information. Yesterday, I logged into the lang account first, which worked, then the lang02 account and the lang02 account wouldn't work. Today, I logged into the lang02 account, which worked, and then the lang account and that failed. I next shut down the web browser and tried logging in in the same order as yesterday and I got yesterday's results.

It appears that the session ids after logging into a 'lang' account will conflict with the other account if you try to log into both.