手機排版請見諒。
今天收到一封美國同事A寫的信如下：
The current status of PO 7721 is that it has dropped to delivery and will arrive on July 14th. PO 7810 is not scheduled to arrive to you until August 18th.
但信件內容有包含美國同事A詢問美國同事B出貨進度的紀錄，
同事B回覆A的內容如下：
We agreed that the 1759 pieces would be available against PO 7721 on 06/26/2014. The delivery has dropped accordingly. The balance will be available on 07/14/2014.
兩段信件對進度的資訊及結論似乎彼此衝突，
其中"the delivery has dropped"更是讓我們摸不著頭緒。
請問該如何解釋這裡的drop呢？
謝謝~