That kinda sucks. I have a similar story.

I once went to see Judas Priest at the Edinburgh Playhouse, and I managed to get tickets for the front row. To my delight one of my favourite bands at the time Annihilator turned out to be the support act. So there I was up the front with my Annihilator T-shirt head banging away, the only person in the crowd with a T-shirt for the support act, and this went down very well with them too who seemed delighted to see someone there supporting them as well as Judas Priest. Anyway, at the end of the support act I went to the toilet and to get another beer, and when I came back my mate was standing there with a load of plectrums that the guitarist had come out and given him after the show, and where the was I? Standing in a queue at the fucking bar!