but i think your packkage will be delivered today, i got almost the same message. here is just for your information,pls ignore it if no help
if efileing for i140 is still good today,
Q24: Will an e-filed I-140 petition (that is not based on a required labor certification) filed on July 31, 2007 receive a priority date of July 31, 2007 if the supporting documents arrive at a later date?
A24. Yes, in accordance with e-filing standard procedures, the date on which the I-140 petition is received by USCIS will be the priority date. Supporting documentation must be filed within allotted time limitations.
link here
update July 17