Hi Chey - sounds like this may have been a caching problem - the Yahoo OpenID screens have a 10 minute timeout, based on your description, it sounds like your browser may have been reloading or replaying an expired auth url.
In the future, please post a link to a reproducable test case, and we can try to debug the issue.
Thanks
Allen
Ok this is getting ridiculous!! Here I am trying to test out OpenID auth with Yahoo! and everytime I make a few changes in the code I get this!!!
"This page has expired, go back to the original page and please try again"