htaccess help

I realized I made a mistake in posting this in the wordpress.com site anyways, this is my wordpress site : https://www.irvinebestbuys.com
The links under “Hot tips” is not working and it use to work before. It now display Not Found

This is what the support at my host sent me
Did you add a Word Press plugin? When I renamed .htaccess to .htaccess.bak the site came up. You will need to take a look at that file and see what is causing the problem.

This is what my htaccess files has in it:
`<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
RewriteRule ^(sitemap.*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress`

Please advise. Thank you!

Ethan