Thx to Taaffe's post, we went down to Bancomer Ajijic to check our account. We found they had made unauthorized transfers and we immediately reported them and asked for our money back. BUT we have to wait 28 days for them to respond. We will pursue other options.
We would recommend every one with a Bancomer account go down to their branch and ask for a free report. Don't just trust the online info - ask for a free account report and check it.
We immediately transferred most of our money out of the account and are looking for a better bank. .