Getting to other (video) Categories from specific any Categories page.

Hi Si Team

There is one thing that I still can not get my head around:

If I go here:

http://www.finalbug.net/blog/entry/560-fcp-x-subtitles-the-missing-webinars-03

And click on the:

4 Videos link this takes me here:

http://www.finalbug.net/videos/group/23-advanced

On the left hand side I see “All videos” = 4.
Which makes sense as I have 4 videos in this category.

If I look further down on the left hand side I see a total of 8 categories including the one I am in.
Again I see 4 videos for the category that I am in.
Totally cool.

But the other 7 categories are all listed and each has in theory 0 videos in them.
I know for a fact that these categories have videos in them.

I see this when I go to the all videos page:

http://www.finalbug.net/videos

There are a total of 40 videos.

Why, oh why, oh why, do I not see them here:

http://www.finalbug.net/videos/group/23-advanced

kindly advise

Paul