site broke, quick css gone

i cloned in my server the content. and that was ok.
after i went to phpmyadmin and did an export of the sql file. i renamed the sqlfile and uploaded but i think it did duplicate tabels.

i erase the sql file and tried to import the good copy but i still had alot of R/n in the database and everywhere on this website.

I have used in phpfunctions the below script which is correcting the issue, but when i remove script the R\n\n erros will come back all around the website:

function replace_content($content)
{
$content = str_replace(‘\r\n’, ”,$content);
return $content;
}
add_filter(‘the_content’,’replace_content’);

thanks Rikard