Iron Horse, I'm sorry you had a problem, but I can assure you that the process is very simple. It's just two clicks for most people.
The fact that the email went to your junk mail folder is where the problem started for you. You were not properly registered or logged in. It could have been a cookie problem in your browser.
The bottom line? You got your certificate and we thank you for becoming a supporting member! Now go get a frame for that certificate!