Confusing much?

Okay I don't know why but I am only able to get into this account every so often even when I try. For some reason it seems like I have 2 accounts: this one with the blog and my gmail one without a blog. I try logging into this one multiple times and it says either account doesn't exist or wrong password. After I try getting in multiple times without success, I finally get in. I don't know what to do. Can anyone help me?