Frustrating!

What the hell....I got hit with comment spam today for Custom Car Seats. I've deleted it and banned them, and rebuilt twice. Their comment doesn't show up on my main menu page but no matter how many times I refresh or close and then open the page it's still there!

What's up?

UPDATED-never mind. A complete rebuild again has removed it. Weird. I hate custom car seats, may they burn in hell.