2 things customers do that stump me. 1) why,after leaving a ltr/pgk at the front door, do they come outside as I get back in my truck and ask "does this need a signature?).....2) when tagging a DSR I'm always scratching out the signature block on dtag & circling the "must be present for sig" AND YET STILL they sign on the scratched out area or elsewhere on the tag..... WHY!!!???