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

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and my inventory transaction for this item is in below image

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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?