Lease Revision Question?

I have been living in my apartment with three other roommates since August 1st. We signed the lease that says, "Rent is due in advance on the 1st of day of each and every month, at $ 2,500 per month beginning on the 1st day of August, 2009" Later in the Lease he writes, "Resident shall pay for all utilities, services and charges, if any, made payable by or predicated upon the occupancy of the Resident, except: ...(In his handwriting) 'Water and garbage will be collected per month at tenants expense.'" This is where it gets very confusing. We signed the lease but he verbally told us that our rent would be 2,605 but the first month would be 2,645 due to the increase in trash and in water, he specifically said that it would be a first month one-time only thing. The last month we wrote him a check for 2,605 and he called us back saying he wants 2,645 instead. We looked back at the lease agreement confused and a little flustered and stumbled across our signed monthly that says our rent is 2,500 per month (He said he used this lease from a million years ago)!? We don't get it! How much do we have to pay per month? We do not recieve any water bill or trash bill directly...We understand we have to pay for utilities but how is it one flat rate? and should we only just pay for 2,500 a month? He wants to revise this, we think he slipped up..what should we do? Oh and he makes us pay an additional 8 dollars each per month for a washer and dryer that is shared with the people below us, is this legit too?