Pick component

We have pick rule with Sub Inv ASC and Locator ASC, but we see one case for a part with UOM Foot, component pick list shows to pick material from two locator in same Sub Inv ignoring this rule. It is asking to pick 3 qty from Sub Inv STL, Locator STL.A30|| and 41 qty from Sub Inv STL, Locator STL.STAGE||. Total requirement on the WO is 44.

Later we found it is picking with FIFO.

STL.STAGE:

OH RECEIVED_DATE: qty 41 on 3/23/17 qty 96 on 5/18/17

STL.A30:

OH RECEIVED_DATE: qty 43 on 5/17/17

So it picked 41 received on 3/23 from STL.STAGE and then 3 received on 5/17 from STL.A30.