When it asked me to put in my password, which I was filling in incorrectly, and it was just kicking me back to my already logged in account without letting me relist my item there was no error message feedback telling me I filled in an incorrect password.
I think the issue has to do with certain actions (such as listing an item) requiring an additional sign in if you have not signed in recently, even though you are currently signed in to the account. This is to prevent someone else who has brief access to your account (say, if you walk away from your computer for a minute or two) from doing certain things to alter your account or listings.
Most password entry forms will simply fail if you enter the wrong password rather than giving you a message about what has gone wrong as a security precaution to prevent others from obtaining any info about your password or username.
The fact that you are dumped back into your account while still apparently signed in does seem to be an oversight, though. Normally you should be kicked out entirely at that point, I think. But lately users have been complaining that when they sign out of eBay they can still go to their My eBay pages without having to sign in again, so there may be an issue with how the sign out process works, at least where users have the "keep me signed in" box checked.
