What if the bounty manager just isn't a native english speaker, hence the misspelling?
It's not fishy IMO, but it's extremely sloppy and unprofessional. Should this be one of the reasons why bounty managers need some forum regulation? No, not at all. It's up to potential bounty participants to decide whether they want to join. Most of us here know a lot of altcoin bounty managers are idiots, as are the people behind the projects that start the bounties.
One thing I'll say is that if a bounty manager is unable to spell basic words like "stakes", it doesn't exactly inspire confidence in me that he'll be able to judge post quality, at least not in the English section. And whether Theymos agrees with that assessment or not, I highly doubt he's going to put any restrictions in place and certainly not some sort of literacy test before one becomes a bounty manager.