Single Status Update
Day 00 - 12/23/2016: Sent N-400 + I-942 to Phoenix, AZ lockbox via USPS.
Day 03 - 12/26/2016: N-400 application marked delivered.
Day 25 - 01/17/2017: Sent email to support regards to application.
Day 26 - 01/18/2017: N-400 rejected because incorrect payment amount.
Day 32 - 01/24/2017: N-400 + I-942 resent.
Day 34 - 01/26/2017: N-400 application marked delivered.
Day 49 - 02/10/2017: N-400 rejected again because incorrect payment amount.
Day 52 - 02/13/2017: Email form USCIS support responded package was rejected in error (!?) for the first and second time submissions, they requested 3rd resubmission + tracking number in order to apply my earliest priority date.
Day 52 - 02/13/2017: N-400 + I-942 resent on the same day, also sent a response to Lockbox to provide information to USCIS.