blogs & tags

I have some problems using tags when in the blogs section.  To see what I mean, click "Blogs" on top of this page, and then under "Popular Tags" select the Tag  "Microstation"  -  I just get  "Weblog not found"

 

Another issue with tags and blogs:  When I go to one of my blog posts, there is a message to the right saying "No tags have been created or used yet"  - what does this mean?  I have created tags for my blog, this is maybe a different kind of tags...?