A little bit confused with the tracking

Hi! I ordered stuff from DX on 19 Jan and was sent the tracking number 22th Jan. Now the package is passed between two cities a few times even though it was apparently once at airport. Can someone please explain why my package is transported back and forth.
This is my status:

Collection Shenzhen FI Sun, 26 Jan 2014 17:21:00 GMT
Opening Shenzhen FI Sun, 26 Jan 2014 18:16:00 GMT
Departure from outward office of exchange Shenzhen FI Mon, 27 Jan 2014 07:31:00 GMT
Delivery to airport Guangzhou FI Tue, 28 Jan 2014 04:43:00 GMT
Opening Shenzhen FI Mon, 03 Feb 2014 08:59:00 GMT
Dispatching Shenzhen FI Mon, 03 Feb 2014 10:36:00 GMT
Opening Shenzhen FI Mon, 03 Feb 2014 17:01:00 GMT
Departure from outward office of exchange Shenzhen FI Tue, 04 Feb 2014 08:51:00 GMT