I don't remember what I ate last night
but I can spout off obscure rules to all sorts of game like nobody's business!
Seems odd to me that there are fewer meeples (8) that the total amount of stickers (18 at 9 per sticker sheet) though, as there's not much point in adding them to the meeples if they all can't be used. Would have been better to have had 1 meeple per character role as they do in some other games.
It sounds like you're missing a meeple. There should be one for each character card.