I would have thought it highly unlikely that Cup games will be categorised like this.
Up until now, Cup games have been charged at a percentage of the full ticket price, based on attractiveness, eg Liverpool - 100%, Gillingham - 50% (or similar). I would expect the same will continue as the...
To be fair I think the student concession areas was not going to be available for all games, only the less 'attractive' ones where there is likely to be spare capacity. As such regular prices do need to be illustrated. I guess the shelf could be the same - available to regular fans for some...
It's the WSM extension - 'the shelf'. I was surprised to see any prices against this area, as it's supposed to be for school parties and similar groups of kids with adult supervision.
I think you've been very lucky somehow, concessions weren't offered in that area:
http://www.northstandchat.com/showthread.php?189011-Falmer-West-Stand-Lower-Zone-E
Have you been W!C since the stadium opened, as there were definitely no concession prices then.
Looking at the season ticket chart and the match price chart, I would assume this is just human error. I just hope, for your sake, that the error is not listing concession match prices and not that...
So it is - http://www.seagulls.co.uk/documents/st-pricelist-2013-14229-781306.pdf
I'm pretty sure there used to be no concession prices in the WSL prime middle seats.