If you have a grid configured with cross-referenced objects, there’s a possibility that one or more child records will match multiple parent records. In this case, GridBuddy Connect will show the relevant records under each parent record, duplicating the child records where necessary.
If duplicate child records are present, and the cross-referenced child object was setup using mapped fields on page 2 of the Grid Wizard, then GridBuddy Connect will synchronize the changes you make across any child record that has duplicates. For example, if you have a grid where Contact is the parent, and Lead is the child, and multiple Lead records match multiple Contact parent records, then editing one Lead record will automatically show edits for the other duplicated Lead records, where those Lead records appear under other Contact parent records.