Spelling Shmelling

Joel Comm, internet marketing machine says that to improve content on your site, you need to improve spelling. Well maybe this is where I'm going wrong.

I met Joel (.) Comm at an internet marketing conference in Las Vegas earlier this year. Yes me and my colleague Helen were sent to Las Vegas for 10 days to learn all we could from the Americans. Joel was a very nice man who I insulted in the lunch queue when he asked if we were from London. There is more than one city in the whole of the UK we said, Joel laughed and wandered off to a table far, far away from us.

Anyway, I think Joel's right spelling is important and if I read something that's spelt wrong it drives me mad - people are paid good money to make sure things are spelled correctly right?
So why can't I spell then?
Why do I have to get everything spelled checked by my computer and then by lovely Joy on reception. Even then every so often I get one of our members pointing out that they would like to 'Refer a friend' and not 'Refer a fiend'.

My argument is that I have a degree in English not spelling.