I don't know what your exposure to public speaking is but I can tell you from a performer's point of view that something like the spelling on a backdrop would be the farthest thing from you mind when preparing for your moment in the spotlight. If she didn't notice it it's excusable.

Now as far as her staff goes, that might be a different story. Guess it all depends on how long they were in the facility before the speech actually began. A lot of these things are like a whirlwind where the limo rolls up to the door and everyone piles out and are directed to the stage. The only ones that really arrive well ahead of the function are the security team and you could hardly fault them for not caring about the spelling.

Now, that said, if Hillary were to pass gas and clear the stage while speaking I'd be the first to point fingers and laugh loudly.

Art