It looks like someone at the auctioneers has got the tickets from several lots mixed up. Your lot of 5 coins is lot 44558 I believe. Also in that sale, potentially matching your tickets, are lot 44553 (Elizabeth shilling mm tun), lot 44561 (James I shilling 2nd bust mm thistle) and lot 44567 (Charles I Oxford sixpence). I can't see an Oxford half pound in the sale so that ticket remains a mystery. It seems a shame to discard the tickets as they should really belong with the coins to which they relate. And presumably, the tickets for your coins are now with the winners of these other lots. Or perhaps some completely different ones? Rather poor service from the auctioneers. I bet they wouldn't have made this type of mistake with US coins?