yes it is bbcode and it's directly from the bbcode index found at the bottom of the page

Here is a comparison of two images.

the image above has the code functioning fine, this is in the type of thread where people can post on.
see the link to understand my phrasing (i know it's not the best)
this is what is shown in the second image,
this is where a clan's members are shown. Note that under the goals spoiler there is a blank space; that is where my slideshow should be.

Here is an image of the actual BBcode you see when you hit the edit button in the bottom right.
from there you can see what im seeing in the BBcode, It works fine on any other thread except on the thread shown in the 4th link.
thanks for any help everyone.