sectioned theme "sticks"

Using D6 and Sections 6.x-1.2

When configuring settings for a section, the theme for the site changes to the chosen theme upon save.

Additionally, once I enter the section for which the new theme is set, the theme does not change back when browsing away from selected nodes.

Additionally, theme only switches for "enabled" themes, which means the user will have the option to switch to a theme that should be exclusive to one section of a website. Setting the section to a "disabled" theme yields no change when browsing to selected nodes.

I have the switchtheme module installed, if that makes any difference.