Over this coming week-end (July 15-16), we will be retrieving and storing product parent/child relationships in our data base. This is in preparation for full support of product variations.
As a consequence, in the Products List screen, you may temporarily see product rows which only display the ASIN. This will be for a Parent ASIN only and is (temporarily) to be considered as normal.
Next week we will collect all parent product attributes and will be able to show product variations charts. Eventually, we will also provide all current product statistics at the parent level in aggregate form.
So, once again, do not be alarmed if you see rows in products list which only contain ASINs.