I had planned a flight to Indonesia out of the US, but plans changed and we went to Mexico instead. I heard that when you go to Mexico by land it doesn't tell the US border system that you left the country... does this mean it might say I overstayed next time I come back on my ESTA VWP visa?
I will be staying for more than 3 months in Mexico and then I have a flight leaving from San Francisco, which will make me enter the US again, will I have a problem?