I forwarded a domain to a blog, but then decided to use the website instead. I turned off the domain forwarding, and not it won't stop forwarding to the old blog. It's been about a week and it still forwards.
Hmmm... How did you turn off forwarding? Did you go to the domain's DNS records, and at the bottom of that page in the Forwarding box click the Trash Can icon and confirm deletion? If not give that a whirl.
If you did and forwarding is showing as being active -- you'll have to contact GoDaddy support to find out why that request is not being saved.
Judith "All people are the same; only their habits differ." ~Confucius