Why are duplicate rows displayed in the list views?

This occurs when you include a multi-select field (e.g., race, clinical diagnosis) or a sub-form (such as MRN) in the list view.

E.g. Participant has 2 race values or 2 MRNs, then the participant is shown twice.

It is best not to include such fields in the list view. However, you can include them in the filters.