Very useful information about PICTORIAL POSTMARKS.
From the FACEBOOK page of the U.S. Postal Service:
"U.S. Postal Service @Dorin Not sure why you didn't receive the messages, but here's what was sent; All post offices should do hand-back postmarks as long as the items are not addressed to Corporations/Businesses. The post office should reference Postal Handbook PO230 for information. 8 minutes ago ·
http://www.apwu.org/dept/ind-rel/usps_hbks/po-series/po-230%20pictorial%20cancellations%205-06%20(570%20kb).pdf
Thank you, USPS!