Some fliught attendants get all bent out of shape when either people try to swap wen one is in coahc and the is in first or if someone in coahc tries to use a bathrooom up front. Thats why I dont even try going up front if Im on coach. I call BS on the security thing.
Now getting back on topic - most probably the ate aent was being nice by releasing one of you in coach. I kind of wish my airline would release us for free in coach, if we dont pay the $20.00 we dont get offloaded even if it's the only open seat on the plane.