Nothing on this end that I can think of...might have been an issue that when you clicked on the first one, the info you have on your pc for login info, in a cookie file, was not read before the page loaded...basically, you loaded the page then it found the cookie and logged you in...so if you had reloaded the page, you would have had it change to being logged in then...
By the time you loaded the 2nd page, it read the login data from your cookie and you were already logged in...

Make sense?