We have all sorts of typos even after reads by three people -- even in 50-point headlines. It happens. Hell, I read a Jeff Foxworthy book back in the 1990s and I saw "Chik-fil-A." If you have never been to one, you may not know that it's Chick-fil-A.
Typos happen. This one is at least humorous. I missed one on a read once that luckily was caught on another read. The writer was talking about a man wearing a blue pressed shirt, except he left a letter out of "shirt."