On site ceremony question

Has anyone heard of the reception site adding a service charge and tax onto the fee for an on-site ceremony? I was married in a church so don't know if this is concidered normal or not.

--The RH orignally gave one price and then when they sent the contract the ceremony fee was quite a bit higher than orignally discussed in writing so now they are saying that the service charge is also on the ceremony charge.

Thanks for any input.