Inventory Column in Parts needs to reflect Total Inventory

Adding Parts (in my case projector lamps), and noticed that when you add inventory (Parts > Inventory > Add Count), the column labeled Inventory in the list does NOT reflect the Total count of inventory, but only the last added amount of inventory.

Example:

I added an Part (DT01091) to parts. Then did the Add Count 3, which showed there were 3 lamps in inventory. We then purchased an additional 3 lamps, and another tech did the Add Count and added another 3. When looking at the Parts Inventory Column in the list, it only show 3 lamps (should be 6). Viewing detail information, I can see in the Inventory History 3 lamps added twice.

So, the Inventory column needs to reflect the TOTAL, not just the last amount added to the inventory.