Well, none of us is immune to the odd typo or occasional grammatical error, certainly not I after 50 years of exile.
However, it does surprise me to see how some mix up there, their and they're and how many on the other side of the pond forget the -ed at the end of a verb in simple past - or is that considered grammatically correct there?
John
PS:- Oh, and "would of" instead of would've (would have)!