Insufficient inventory transactions with status Purchased and Compare purchase order and invoice values while posting the purchase order

Hi 

Currently iam facing this below error while posting the purchase order

and my inventory transaction for this item is in below image

As you can see in the transaction that i have already invoiced the 2quantity after this i registered and received the 1 quantity.

and other question is that after posting the product receipt two transaction obtain first one with received and other one with ordered.

1quantity with ordered transaction is correct?