I think the process is that there is a manual review by admins and/or mods to verify that the bet was legit and not a setup that allowed people to earn a quick buck. So you can't make a new bet while the previous one still sits in the queue.
I assume it already went through the manual review when it was paid out? I dunno, I guess I'll see what happens.
Bet Shiken that COD would outsell Battlefield in 2018. http://gamrconnect.vgchartz.com/post.php?id=8749702