After editing the page, the content appears normal on your site. I suspect that somehow you had a cached version of the page from when BB-Code was disabled. Also, you currently have page_img disabled, so images are not working. If you change that, you would have to edit the page again or rebuild the whole cache.
For easier debugging without disabling the cache, you can always see the uncached version of a page by adding the nocache=1 URL parameter. I will leave this open for now, since I think it would be more intuitive if changing the parsing options for the index or an area invalidated the relevant caches.