Is there a common reason (error on my part) why a row entered into a WPDataTable, and captured in the database as one row, would then render as duplicated rows in the WPDataTable?

It's appearing as duplicate rows in the back end as well as the front end - see attached.

Andrew

Thanks - it was an error in my SQL.  I still don't know exactly what.

For the sake of anyone experiencing a similar issue.

I was trying to load front end data visible and editable not by everyone, and not just by the owner, but by all members of a hidden or private BuddyPress Group.

Some simple JOINING of three tables (my data table + bp_groups + bp_groups_members) and a WHERE statement ended up solving both problems:

SELECT (etc.)

FROM my_data_table RIGHT JOIN wp_bp_groups
ON my_data_table.groupslug = wp_bp_groups.slug
RIGHT JOIN wp_bp_groups_members
ON wp_bp_groups.id = wp_bp_groups_members.group_id
WHERE wp_bp_groups_members.user_id = %CURRENT_USER_ID%

The front end tables can also be edited and saved.