Hi, my situation could be connected with yours... I noticed my price is higher for 1 or 2 euros then the price I have set up for my rooms and this is connected with the new fee - now they are charging a fee for conversion ( because there is so many currencies and they obviously loose money over conversions ) , so they always set up a 1 euro higher price then the one you set to be. So maybe this is connected, they "took" one euro from you for conversion fee, until they start aplying it as one euro higher price.
You should contact them, no matter if it's just one euro.