Inventory items all have 5 lots.

We are noticing in one of our items that Lot 1 has a Receipt Number, the date of the Receipt, but Quantity on Hand is zero, and the total cost is zero. Lot 2 is the same sort of thing, receipt number, date of receipt and zero on hand, zero cost. Lot 3 has no receipt date, no receipt number, and zeroes for qty on hand and cost. Lot 4 has actual quantities and costs, as does Lot 5. Why are Lots 1, 2, and 3 not disappearing? Shouldn't Lot 4 and 5 have already become Lots 1 & 2? How do we fix this?

Most puzzling.