I think the “reorder messages…” dialog could be improved.
the messages should be sorted each time the dialog opens. that way if you don’t have to move everything around just to swap two entries.
typing in a number that already exists should bump the existing entry (and all successive entries) to the next number. i.e. if you have
and you set “3” to “2” it should become:
currently it doesn’t allow you to change an entry’s number to an existing number.