I called Continental from the airport (in Oranjestad, Aruba) when I learned I was bumped down. The Onepass curtesy desk told me the airport made the bump and I will have to check with them, which I already know. My guess is because I was the last one to check in the counter agent thought I was not showing up so she bumped me instead. I don't know if I showed up earlier it would have made a difference.