Cannot remove sidebars from pages

Using 3.6.1 and can't remove sidebars from a page. In "Style and configure sidebars" I have have entered the ID of the page in "LEFT sidebar: Don't display on Pages." I've also done it for the right sidebar. Yet, the sidebars still display. I'm getting the page ID from the URL when editing the page, http://www.2-speed.com/wp-admin/post...35&action=edit. Thus, post ID 535. that is what's being entered in the "Don't display on pages" field.

I'm baffled. The page is: http://www.2-speed.com/library/. Any ideas?

TIA.