Customize text template as setting in ATO>>Sidebars & Widgets>>Style Widget

I would like to display my text widget who returns categoy posts on each post page under a certain category
(really i setting it only for posts belonging to next categories :

1. Rugby
2. Stadi del Sei Nazioni - RBS Six Nations Stadium

)
as explained here.
When everithing is setting only Category pages ( i.e. the two mentioned above) and front page sidebars will show 10 recent posts.