Dear Naovaree:
First, we delay the shipment because some part is delay, as factory could not complete them on time.
Second, you send Po for many times in month, we could only arrange shipment for some PO together.
For an example, before we getting the new Po , we could complete the original PO on 2016-01-05.
But we get your new PO again, but we could only complete it on 2016-01-09, than we will delay the shipment again, as we will arrange shipment for new Po together with original PO together.
(as some po, the value is little, we could not arrange shipment single)
So in future, the M.O.V should be usd 2000, than we could arrange shipment single and shipment will not be delay.