Ann: High Grade Ore Sales Commenced from Koolan Island, page-212

I also disagree that this is necessarily a significant sign. The boat carrying the first shipment also spent a couple of days loitering in the channel just off KI. Weather, crew requirements, timing of availability of berths in Qindao, there are dozens of possible reasons for a few days delay. I'm also not sure if you're using a live-data ship tracking account, because many of the free ones don't show up to date positions.

In any case, while the market will doubtless react to a slight over- or under-performance relative to expectations for the quarter, long term holders will be more interested in systemic changes in performance (and notably the IO outlook), not quirks of timing relative to boats departing either side of June 30th.