After logout i am redirecting to a wrong page?

Hello Admin,

After logout i am redirecting to a wrong page?

I mean i am actually inside my account, then i clicked the "LOGOUT" then i redirected to the wrong site, which is i don't want to happen.

This is the link after clicking the "logout" : http://blog.prosper8dotcom.com/blog.prosper8dotcom.com/home

My question is... after i click the "LOGOUT" button, i want to redirect to this page:
http://blog.prosper8dotcom.com/

Please help me to resolve this issue.

Thanks a lot.