No recent guests from Mexico and I live in the middle of nowhere so I know that my wifi isn't being used by anyone else. I have tried logging in and out of my account and it does this on all the machines running in the house even if I am not logged in. I have set my account preferences and it doesn't help either. It even shows my location on the google page (not in Mexico).

I appreciate the helpful thoughts, Thanks. Wish they worked. I am completely flummoxed by this weird occurrence. Google searching the problem (yah, ironic) seems to imply that the issue is an internal one with Google's labeling of my IP as somehow in Mexico. I have reported in to them twice now but it has not helped. Would love to have any other advice on next possible steps.