In betalabs
(1) Adding Categories to a post

1. Start a new post and add a category , e.g. [[Category:Cat health]]
2. Save the post - after saving nothing will be displayed; it looks like an empty edit.
3. The page (Flow board) won't be added to the list of pages on Category:Cat health

(2) Adding Categories to a topic Summary

1. In a Summary to a topic add a category, e.g. [[Category:Cat health]]
2. After Save, the Summary looks empty

3. The topic is added to the list of pages on Category:Cat health, as 'Sep 23 on Talk:ET102' - notice that the topic is listed under 'T' for 'Talk', not under the topic title name
   

The issues

• should be adding Category to the post allowed?
• should be an added Category to a topic displayed? Since the action (the Category is added) is successful.

To compare, adding a category [[Category:Cat health]] to the Board description

• is visible after Save
• the Flow board is added to the Category list of pages