I posted this on the Zemanta support site:
There is definately a problem with the import of blog from Google's Blogger (Blogspot) to WordPress.org.
- Google -> labels
- WordPress -> categories, tags
The import puts labels into categories and I am sure this is wrong, especially after reading what tags v. categories really is. Labels are really tags and not categories and this is where the Zemanta addon shows the discrepancy. In Blogger it will help you add labels and in WordPress it will, in my opinion correctly, help you add tags.
Then you suddenly see there is a problem, your old imported posts have lots of categories, while your new ones have tags.
The added problem was that I could not uncategorise in my post edit but had to remove all categories through the Manage - Categories menu.
I was about to report this as a bug but wanted to put it to the Forum.
What do you guys think?