Mod-Security Issues

I’ve been having issues all week and still cannot find a way to resolve them. Thought I would try you folks for help. I have multiple WordPress sites on Bluehost and they cannot seem to help. It started when I could not login to any of my websites and got this message:

Not Acceptable!
An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security.

Bluehost went in and whitelisted me. However, immediately afterwards I was unable to upload media or plugins. I cannot change or update anything on all of the WordPress sites on this server.

Interestingly, I have tried this using a different computer with a different IP address and was able to login and make changes. I’ve changed my IP, tried different browsers, have deleted cache. Nothing works.

Bluehost is insisting the mod_security problem is no longer responsible for what is going on. However, I have gotten another mod_security error message. From what I am seeing their could be a way to to eliminate this in my htaccess.file which I am totally ignorant about. Looking in that file, I see code that I am not sure is supposed to be there. I’m going to paste it below. If anyone sees something out of place or knows what might be happening, I would greatly appreciate any help you could provide.

# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_expires.c>
	ExpiresActive On
	ExpiresByType image/jpg "access plus 1 year"
	ExpiresByType image/jpeg "access plus 1 year"
	ExpiresByType image/gif "access plus 1 year"
	ExpiresByType image/png "access plus 1 year"
	ExpiresByType text/css "access plus 1 month"
	ExpiresByType application/pdf "access plus 1 month"
	ExpiresByType text/javascript "access plus 1 month"
	ExpiresByType text/html "access plus 5 minutes"
	ExpiresByType image/x-icon "access plus 1 year"
	ExpiresDefault "access plus 6 hours"
</IfModule>
<ifModule mod_headers.c>
Header set X-Endurance-Cache-Level "2"
</ifModule>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress