When creating a Custom TSV on the Roadmap Item (RMI) object and setting the API Attribute ID, a new set of Per-Period Metric fields are added into the View Options on the RMI Grid.
Steps to Reproduce:
Expected Results: The Per-Period Metric View Options should NOT be duplicated.
Actual Results: The options are duplicated and you can set them separately, but really it is the same because, when you update one set of fields, the other set of fields are updated.
Release : 15.9.3
This is DE62767, fixed in 16.0.0
Workaround: None or don't create custom TSVs on the Roadmap Item Object.