Sorry but its just typical Ryanair - everyone knows thats what they do.
We often book cheap flights with them, and if there is 6 travelling then the fee for your card is 6x what the charge is, even though its only a single transaction on your card.
It has got to be illegal and hopefully the Gov will do something about it in the future.
It will be inetresting to see how Ryanair deal with this when the law comes in soon that forces them to show the price inclusive of ALL charges.
They give away cheap flights with one hand and rob with in charges with the other.