I wonder why my Amazon package is stuck for more than two days at DHL facility in "Staufenberg DE"? What prevents them from sending it further?

I googled for "Amazon DHL" and found only negative feedbacks about delivery when DHL delivers Amazon packages. Packages are lost, delivered to wrong address, returned as undeliverable without any real delivery attempt, etc. I start to fear that my package will be one of those unhappy stuck packages. One girl had her package stuck in DHL for two weeks while she specially paid for 2-3 days delivery (high-priced delivery service on Amazon).

I do not understand why Amazon cannot use UPS? UPS is much faster, has much better tracking system and they can deliver to the door. DHL just sucks comparing to UPS.

Btw, DHL tracking number provided by Amazon is not recognized by DHL system. Funny, huh?

I collected some bad expiriences with DHL below. Links do not look nice due to web site design but the number of them says for itself...