Issue: Multiple Google Accounts

I'm having an issue with 1Password 5 on Yosemite when I use it to fill my password for my Google Drive account. I have several Drive accounts that I switch between on a regular basis. Google knows which one I'm trying to use based on the document I attempt to access from a bookmark, and it auto-fills my username. However, 1Password doesn't pick up on this and will always fill in the alphabetically first login details I've saved. This is frustrating because Google is boneheaded and will accept that password and log me into that other account, causing me to have to log out and go through Google's whole clunky switch process again.

So, maybe more clearly this way:

• I want to log into Google Account B.
• I go to Google and it fills in the username for Account B.
• I press Command-\ to auto-fill my password from 1Password.
• 1Password fills the password for Account A, which is alphabetically first.
• Google signs me into Account A and locks me out of my file because I only have permission to see it on Account B. (It's not appropriate for me to share the document with Account A. I maintain accounts for two unrelated companies.)

System details:

• 1Password 5.0.2
• Dropbox sync
• Mac OS X Yosemite 10.10