The local web interface information for the GV account is ignored, and irrelevant. The OAUTH process exchanges secure access tokens with the device, and the GV password is not stored on the device. Whatever you have in those fields is stale at this point.
Your issue may have been caused by still being logged into the first GV account on your web browser, and the browser's session cookies or permanent cookies were still pointing to the other (wrong) account.
The correct (and easy) way to change GV accounts registered to a SP is to simply run through the configuration again, and the portal will actually display your logged-in Google accounts, and ask you which account to use on your OBi.