Inserting a row in grid inserts 2 rows if 'Add Row' row is the current or selected row

Inserting a row in an editable grid inserts 2 rows if the 'Add Row' is the current or selected row.

This is only confusing for grids on which no default values are displayed when on the 'Add Row' of the grid (the one with an asterisk in the row selector).

Grids updated:
Clients form, AKAs grid