nginx rewrite issue

okay i am having some problems with nginx write algorithm with wordpress.

i am using this for the rewrite and it works good;

server_name         www.domain.com domain.com;
    if ($host != 'domain.com') {
    rewrite ^/(.*)     http://domain.com/$1 permanent;
    }

it makes this url;

http://domain.com/?author=1

to this;

http://domain.com/author/username/

which is good but with an url like this;

http://domain.com/?author=1&type=like

it makes it;

http://domain.com/author/username/?type=like

and i am not getting any error but the query is not working.

what i am missing?

thanks.