Automated sites sometimes have issues like this. I frequently had a flight to VIE that showed canceled. The reason being, the flight number for a flight to Strasbourg was being re-used and since the Strasbourg flight was no longer being flown, every day that quarter, my flight to VIE would show up as canceled. Needless to say, it wasn't.

Websites are good for supplemental flight information, but nothing beats talking to the airline or airport itself.