Google multiple account login tends to go crazy at times, and if you start logging in and out of accounts, all services start to log you out, log you in with the wrong user, or just go into a crazy loop where you login into one account and get logged out of the other. This is specially a problem if one of your accounts is a Google Apps account (like a work account) because some google services might be disabled for that account or they just work differently.
Here's how to fix it (maybe, it works for me):
- Logout of all your accounts
- Close your browser (seriously)
- Open browser again (duh)
- Login onto your personal account
- Login onto with your personal account onto services which might be disabled on your work account or have weird login processes (youtube, g+, etc)
- Login into your work account. Repeat for anything with the weird login processes