and tags creating extra space when using wp post tabs

Does anybody know why wp generates
tags when using the wp-tabs plugin? I can see the
tags in my live code but they are not visible when I am editing in html mode on a post.

In addition, when I delete the tabs from my post, the spaces seem to disappear. They appear in the top margin above my wp-tabs menu, as well as in random places throughout my wp entry.

If anyone knows how to get rid of these invisible, automatically generated
tags, I will be forever grateful.

Thanks in advance!

http://wordpress.org/plugins/wordpress-post-tabs/