Where do these people get their tickets from? http://thelondonticketagency.com/browse.aspx?type=football&search=event&event=306
They mean the seats have Hull City fans in the tiers above and below(ie they are in the East of the stadium).
I would look up reviews for the various sites first, Warwick. That one is based in Panama and v new. Lots of the others have poor review ratings - with horror stories like people turning up and tickets are fake etc etc