I also am automatically supposed to be logged in, but it would work on either the work or personal computer, and I was not logged in automatically this time, either, although it did when I logged out and retried it. Weird.
I encounter this odd situation with MyeBay on occasion. If I go directly to MyEbay, it says I need to sign in! But...If I go to the eBay site, it lets me right in; then I click on the MyEbay box in the top right corner and the confuser takes me right to MyEbay!! Confusing to say the least!!!!!
No password reset required here either but I am thinking it might be a good idea to change it if there's been an issue.
A gentle reminder to everyone, do NOT reuse the same password for different sites, that is how you get your identity stolen.
If you have issues remembering them use a tool such as Keepass KeePass Password Safe that way you'll only need to remember your Keepass password. It is also good for generating hard to crack random passwords.