Iberia via Flightnetwork - not charged full amount
I made a booking - about £258 - for some business class Iberia flights via Flightnetwork - reason for not going direct was that I needed three flights on one day and IB prevented that by rule.
Went through OK and I received a confirmation and eticket (first leg marked CONFIRMED APRT), shows up OK on checkmytrip and BA / Iberia. So all looks good, but I've been charged an amount of $123 by FN, and nothing else - I was expecting a charge via IB.
Anything I should be worried about? This was only 4 days ago and the flights are not until next year, but vaguely concerned.