Hi,
While you on htaccess, add some more things to speed your site up and add cache since you have none and it gives a 304 on some of the files you are serving. Please go here https://github.com/h5bp/html5-boilerplate/blob/master/.htaccess and transfer lines 152-187. save and if your server still is displaying your website, add lines 189-250. save. and see if website still works. then lines 292-302.
*make sure you are doing this via ftp so if there is a problem, you can revert back* since some poorly configured Apache servers may have a problem. Having these lines included will do wonders for your speed.
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I believe your RSS issue is caused by the pretty permalink structure not working correctly since you have no htaccess file. Normally, a wordpress htaccess file would have
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
Also in the backend of the theme please change Settings > Permalinks ... to default setting.' and on Settings > Writing, have every checkbox turned OFF. and on Settings > Readings have it 'show blog summary only in feed' and have UTF-8 for encoding.
Thanks,
Nick