Reg : Reserve Order Concurrent Program is not working as expected

Hello Experts,

Reserve Order program is not working as expected.

Below is the scenario.

I've a On-hand quantity of 4 for Item A.

and i've four Sales Orders

• Sales Order 1 with Schedule Ship Date of 06-Aug-2014 ( 2 quantity of Item A)
• Sales Order 2 with Schedule Ship Date of 06-Aug-2014 ( 2 quantity of Item A)
• Sales Order 3 with Schedule Ship Date of 12-Jun-2014 ( 2 quantity of Item A)
• Sales Order 4 with Schedule Ship Date of 29-May-2014 ( 2 quantity of Item A)

I ran the Reserve Order Concurrent Program with Schedule Ship Date as Order By parameter. The Program reserves the quantity 2 each for Sales Order 1 and Sales Order 2.