Is there a property to identify an activity that is on a resources non-scheduled route?

Summary:

Hi, I am trying to ensure that a button appears on the activity details screen only if that activity is the current one or the next one in the route. I am currently using the following visibility logic (which I lifted from another visibility) but it is also showing this button on the Unscheduled activities also - 'Postion in Route In [1], [0], [-1], [-101]'. Is there a way I can ensure it will not appear on the Unscheduled activities? I'm not exactly sure what the [-1] and [-101] refer to so maybe I need to remove one of them