Created attachment 3357 [details] screenshot If you have 12 patron categories, only 10 are shown on the notice triggers page. It's not possible to configure settings for the missing 2 patron categories, because there is no pagination on the page. (tested with English sample data)
I don't see the issue described in this bug. I have 13 patron categories and all are displaying. Are you sure all your 12 categories have "Overdue notice required" set to "Yes?"
Will test!
Owen: you are right, it depends on the 'overdue notice required' setting in the patron category. Marking bug invalid.