hey mod/admin/peeps!

i usually have my browser auto delete everything including cookies, meaning i have to log into my account 'jujubii' everytime (I am 100% fine with this).
However, more recently, before i even get a chance to log in... on the top right hand corner where it asks for user/pw, it shows that i am already logged in as a random user. as this random user, everything under the 'Last Post' column is Private or Never Read or something of the like. If i click on a topic (which directs me to the subforum), the top right hand corner shows as if i wasn't logged in//has a text box for credentials//as a guest browsing the website.
this find this very odd... please note that i only have ONE account: jujubii
i have a little snippet in the attached files of what im talking about. it has also logged into other random account including 'Officer Pete' and others that i do no recall.
it's not much of an issue for me, as i simply log out and log back into my own account. but i just wanted to let you guys know. it's odd.