I wonder if there is a number to call to check if your package arrived at Chicago lockbox. Or did you already try that? The reason I am saying this is because previously I've mailed a package (not to USCIS) via USPS, and the delivery status never changed online (just acceptance and processed). I called them and they weren't helpful. Eventually the package arrived, but the delivery confirmation sticker was not on the package (it got lost in transit), so it couldn't be tracked. Perhaps your package is already there, just not trackable!
Originally Posted by PPCK8
5/1: Not selected.
7/15: Selected, but..
4/29: Just found out I'm DV2012 winner. CN# AS4XXX
5/1: DSP-122 to KCC, $330 to DOS
5/1: DV2013-SELECTED AGAIN! CN#AS5XXX
5/2: Documents arrived at DOS
5/3: I-693 completed, DSP-122 arrived at KCC
5/4: $330 cashed
5/17: NL from KCC
5/18: DOS Receipt
5/19: I-485 mailed, arrived 5/21
5/29: Check cashed
6/6: Bio for 6/27->done
7/31: IL for 8/7->done, decision status approved online
8/9: Approval letter, CPO