Caspio tell me I have an invalid column name when the "priority" field in your example is a 'list-string'? Is this a limitation?
UPDATE - looks like so: http://howto.caspio.com/tables-and-views/data-types/list/ "
At this time, List fields cannot be used in Rules, Charts, Pivot Tables, Grouping, Aggregations, Parameters, Formula Field, and Calculated Field. Lists will be supported in more areas in future releases."
That is kind of a deal-killer for me, wonder if there's a workaround?