I'm not using the import css styles option, but rather just adding a few custom styles to the tadv-mce.css plugin file. Looks like it's working great, however the dropdown menu is also including a bunch of extra styles (alignleft, alignright, wp-caption-dd, etc.) that look like they're being pulled from TinyMCE's "content.css" style sheet. How do I prevent these from being shown? Thanks!