Comment 1 for bug 644824

At the moment, the Canonical SSO (login.launchpad.net/login.ubuntu.com) links a Launchpad account to a single OpenId identifier. This is reset when you log into Launchpad. So if you log into Launchpad using your first login.ubuntu.com account, and then log into a different service with your second login.ubuntu.com account, your Launchpad credentials are not reported. Also, this information is replicated asynchronously from Launchpad to the Canonical SSO so there is lag that can cause confusion.

Solution should be to use one Canonical SSO account and stick with it.