Everytime you enter Thailand it resets the 90 days. So on the system only your latest entry is counted for 90 days. So you should be fine. Just go for the next 90 days report when it's due and do it as it's your first time doing the 90 days report and you'll be fine. They won't fine you for the last 90 days report as in their system your 90 days is counted from your latest entry and on dtv there is only one 90 days report per entry unless you're extending the DTV in Thailand for another 6 months. So relax and act dumb!