I highly agree!!! The price for doing a lawn is just that, for you to cut it and do it right. You wouldn't cut it once and charge the going rate if it needed double cut? If you get paid one rate for the month, would you double cut? YES. You want to be invited back to do the work again the next year, and want more work to arise from an expert looking lawn. Double cutting doesn't take double the time. Alot of things have to be in consideration when setting your rates and this is one of them.