Ugh, lucky! This is the 3rd time I've tried and no luck at any. I did get an e-mail this time, though, saying that I was not one of the ones chosen.
I'd say it's worth a shot to go show 'em Saturday.
Send an email to firstname.lastname@example.org and the people there should be able to help you. I thought after last time this would have been fixed by now but evidently not as people are still getting two emails.
I would bank on not getting a M&G for this show unless they tell you otherwise. Other people who've had this happen have gotten offered a M&G for a future show to make up for the mishap.