I don't know how many of you get the chance to logout of your adsense account and then try to login to a different adsense account. Well, I help some of my clients with their adsense so I do, but when trying to re-login I enter the previous account although entering a different email and password and yes, I did logout properly before.
maybe that's because of the cache or something. it happened to me long time ago, but after a few refresh i can log in using my account normally, and so with the other account
I think it's an error in Googles cookies or something. Do you have 2 adsense account you can try loging in to?