They probably charged the printing costs to print the report as a disbursement also. All of this would likely have been noted as additional fees and charges in your agency agreement despite them maybe not charging for the services previously.
Having said that Strata Managers are in the industry to make money and this is one of the ways they do so i.e. Win your business with lower standard fees and hit you with additional monthly charges which you have no comeback for.
Owners Corporations really need to insist on full transparency and the best way to do this is ask for fixed disbursement fees or one all encompassing management fee and when tendering for management services insist that everyone quotes like for like.