I don't get the whole single seat thing? So there are no more multiple seats available? Wouldn't even mind standing on the hill.
That's right, according to Ticketek http://premier.ticketek.com.au/shows/show.aspx?sh=ADELC0314#.UzgEefmSxPY there are only individual seats, no multiples available in all seated areas so the hill (or standing at the back of the seats in other areas) is the only option for people wanting to go with someone else.