P31113 issue same item from two different branches

Dear all,

I'm working in E1 9.1 version.

the WO part list has the same item to be issued from two different branches.

when performing the automatic issue in backflush mode a strange behaviour's occurred:

until the planned qty on the first item in WO part list has been reached, the system issues only taking into account the first item; afterwards, so when the planned qty on the first item is equal to the actual qty, all the following posted issues are summarized on the second item in WO part list.

please consider the example below:

Q,ty on WO = 100

component A has to be issued  form branch X   ( bom = 1 A)