Multiple Account Assignment - distribute sequentially

Question

Users create a po item with multiple account assignments, distribute on a quantity basis(distribution), and distribute sequentially (partial invoices).  Goods Receipt Indicator, GR-Non-val, and gr based IV are off.
when using miro to post an invoice, the first suggested account distribution is for the entire amount.  on the account distribution subscreen, the amount is modified to reflect the partial invoicing, the amount/quantity are recalculated, but the distribution remains proportional . 
Po 1, Item 1 qty=1000, unit price=$1. account assignment=distribute on a quantity basis, partial invoice= distiribute in sequence, account assignment #1 qty=900, account assignment #2 qty=100.
attempt to create a partial invoice via MIRO ($100).
MIRO proposes $1000 and on the account assignment subscreen shows account assignment #1=900/$900 and account assignment#2=100/$100.  obviously attempting to invoice the full amount of the po.
If you change the quantity/amount on the subscreen to 100/$100, you would expect all to go to account assignment#1 since partial invoice is 'distribute sequentially'.  However, the subscreen 'checks' with 90/$90 and 10/$10.
Any ideas?

Answer 1

Hi,
The valuation of the purchase order item will  take place at the time of invoice verification.
During goods reciept thr r no accounting documents gets generated, at the time of invoice receipt u can specify cost center and GL accounts for posting.
If partial delivery is done for the PO, then during GR the system cant estimate the qty to be posted to individual cost centres, so only GR is non valuated and during invoice reciept u can split the qty among individual cost centers.