WordPress redirects to wrong URL

Hello, Does this make sense to anyone?

When I type http://come2balance.nl/wp-admin in my browser, then it loads with a 404 error (oviously), http://www.come2balance.nl/come2balance.nl/wp-admin/
If i then remove the http://www.come2balance.nl/ part in the beginning, in the browser it does load correct at http://come2balance.nl/wp-admin/ but why does it first place the double URL there?

Simply loading the website at this url does not seem to have this issue.

Thanks!