Hey, Ive been looking around for a bit and there seem to be a lot of people having the same problems as i have which is the following:

When i try to add my server i get this:

One of the following suggestions may help you: Your server is currently offline.
GameTracker needs your server to be online before you can add it to our database. Please restart your server and make sure it's up before hitting ADD SERVER again.

You entered the wrong query port.
Please update your query port and hit scan again

Your server is firewalled.
Please turn off any firewall you have that may block scanning


Well, my servers are online (full when im writing this), the query port is exactly as it should be and it help if i put my firewall down temporarily...

Could it be because i have 2 home dedicated servers? (they run from my pc)

If it helps when you turn your firewall off temporarily, that would indicate that you have not opened the appropriate ports or have not done so properly. I would recommend consulting the documentation that came with your firewall for instructions on how to open ports.