Thank's for the fast response.
Let me show you how does these redirects have negative impact on SEO.
Check out this image please :
As you can see, google has not taken keywords in domain name, Even though this issue will have negative impact in SEO for all websites, that would be extremely bad for exact match domain names like mine (discus.fish which contains my 2 major keywords, the discus and the fish)
The issue is on forums and threads links and the home page does not have this problem anymore.
You can even see the same problem on your domain in google as well:
It has an obvious impact on SEO, I don't care about the redirects if there were no such issue but i have to solve this problem. As far as i know, non of popular scripts like wordpress or VB have such issue.
Just tell me what should i do to solving this problem?
Thank's again