Hi,

 yeah, that sucks.. However there are many cels 
per sequence and I would have a very hard time 
telling the differance of two cels that were not 
next together and to top it off on a computer 
screen. Maybe this other person happenes to have 
A6 for example and the one you see is A7..I would 
wait to see what the dealer says. Bottom line is  
you are going to get your money back that is good 
belive it or not that doesn't always happen. As 
far as the dealer everybody makes mistakes 
however you may want to double check everything 
before dealing with them again. Cheer up it 
should work out for the best ^_^

 Later,

 Matt