Hi i'm having a bit of trouble understanding the statuses of my packages.

Cami, I guess that two of your parcel should be held by the customs. Please try to ask help from your sender immediately.

Destination Country-America

2014-11-11 00:00 America Arrive at America Airport
Original Country-Yanwen［6757927B］ To China Post Air Mail［6757927B］

2014-11-10 00:00 BeiJing Hand over to Airport, Flight No. CA981
2014-11-09 00:00 BeiJing Departure from Outward Office of Exchange
2014-11-08 00:00 BeiJing Arrive at Post Office Processing Centre
2014-11-08 00:00 BeiJing Arrive at Outward Office of Exchange
2014-11-04 00:00 ShenZhen Arrived at ShenZhen Yanwen Sorting Center
2014-11-04 00:00 ShenZhen Despatched from ShenZhen Yanwen Sorting Center

This hasn't updated for a while and is still "in transit". So what I understand is that, it is already in the US but stuck in US customs? /:

Yes, it's possible that your parcel is held by US customs.