How to fix Bin Quantity and Location Quantity Mismatch?

Hi There

I have an inventory item which is showing a quantity of 2 on hand though 0 available.

Inventory Detail subtab:

This is on the Purchasing/Inventory tab for the same item and for the same location as the bin in the above screenshot:

1 Why is there a discrepancy in quantity on hand vs quantity available given there is 0 quantity committed and 0 on back order?

2 Why is the quantity available showing as 2 on purchasing/inventory tab though 0 under the quantity available column for the inventory detail tab?

Thanks