dns: the website redirects to a different site. I have tried several things and cannot solve it

The website owns both websites and I am on the same server. webproof is not used and I have removed it. but it seems that iproof is still transferring to webproof.
Things I have tried.
1. moving iproof's IP address to a different one.
2. Delete the web proof DNS settings.
3. remove webproof from the web server. I just deleted the whole thing.
4. made sure the iproof dns settings were correct and not cname for web testing.

I can't find any settings in the plesk module to transfer to webproof. What are everyone's ideas to stop the transfer?