I can select one value or multiple connected field values, but not unconnected field values, for example:

Assume the field values are, in sequence, 1,2,3,4,5,6,7,8,9

I could select 1 or 5 or 7, for example, or 123, 3456, 567, 89, or any combination of connecting field values.

However I cannot select, for example, 136, 24, 148, 1679 or any combination of values that are not ALL connected on the form.

If the pick list sequence was 5832961476, i could again select 1 or 5 or 7, but not 123, 3456, 567, 89 as these are not connected field values on the list. I could select 583, 329, 2961, 76 if the list was in this order.

How do I select multiple values on a pick list that are not connected to each other?