Standard Goods Receipt PO resulting in odd Journal Entries

Question

I posted a Goods Receipt PO which inculded quantity 3 of an item that is $77.60.
Normally, this should create a Journal Entry where Inventory gets debited $7760x3=$232.80 and the allocation Account (GOODS RECEIVED NOT INVOICED) on the credit side for the same amount (232.80).
However this time the resulting JE
(1) credited GOODS RECEIVED NOT INVOICED for the expected amount (price x quantity = 232.80)
(2) also credited COGS for $1472.37 and
(3) debited inventory by $1705.17 (the expected $232.80, plus the unexpected $1472.37). 
Why is the $1472.37 included in this transaction at all - it should have only credited GOODS RECEIVED NOT INVOICED and debited INVENTORY both by $232.80.
We use FIFO. We do allow negative inventory, however this inventory item was not in negative quantity.
thanks!
Geoff

Answer 1

Gordon, thanks
When you say "the cost posted would be the earliest inventory for those items" what do you mean? 
I understand that if I posted an AR Invoice , the COGS would be calculated from the oldest available layer, or if the item had a negative quantity on hand, it would have posted the price difference between those transactions that caused the inventory to go negative and the actual price once a transaction occurred that brought the inventory to zero / positive.  Or if there is a difference in price between a GRPO and AP Invoice, the difference is allocated to the Price Difference Account.
However in a normal GRPO inventory should be debited, and Goods Received Not Invoiced (allocation account) credited... Why is there a JE to to any other accounts period? 
What circumstances could cause these?. 
Prior to this GRPO, the inventory audit showed the item at 70 on hand, $670 cumulative value.  After the GRPO (on which the GRPO Total is $232.80), the inventory audit says 88 on hand and $2375.34 in cumulative value.  This doesn't make sense