lol you should look at the bill yourself..
cause Am I missing something? I've seen the oldest meters out there to the newest digital meters out there.. Hourly meter readings?? 100's of pages for water usage?? I highly doubt it... If they used there equipment to that extensive amount they would have been able to come out quickly enough to say there is a leak instead of waiting 5 months with a 1.5GPM leak . The water districts don't have the resources to monitor a small residential unit to that extensive amount and have it justifiably be cost effective.
I just dealt with a $16,000 water bill.. Found the leak and repaired.. How many pages? 1..
And what the heck man? It's your system- why have you not been out there yet to confirm/ resolve the leak?