As of 16.0.1, the Project object has two fields that are only used with the 'Autoschedule' functionality and are not fields you see, except when a project has a 'Tentative Schedule' created from the Autoschedule functionality. The 'Start (Original)' and 'Finish (Original)' fields should NOT appear in the pull-down list in the Roadmap Create Item Events modal. There is no information for these fields unless a project is in Tentative Schedule mode and should only appear within the Project Tasks Module.
Expected Results: These fields should NOT appear in the pull-down list.
Actual Results: You see both Tentative Schedule 'Start (Original)' and 'Finish (Original)' fields from the Project Object.
Fixed in Clarity 16.0.2
Workaround: None. You can ignore these fields.