I could be wrong but I don't think bill.com has anything to do with PayPal. And if I remember correctly, the pay date shown on your Phantom shop log is the date the payment was sent to wherever for processing then send the check and then wait for the USPS to deliver. They call it "snail mail" for a reason!
I would double check your mailing address in their system and give it until the end of this week. One MSC had my zip code off by one digit and the USPS returned the check as "deliverable." Keep us updated.
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“I'm the one that's got to die when it's time for me to die, so let me live my life the way I want to.”
~ Jimi Hendrix
“The fear of death follows from the fear of life. A man who lives fully is prepared to die at any time.” ~ Mark Twain
“To the well-organized mind, death is but the next great adventure.” ~ J.K. Rowling, Harry Potter and the Sorcerer's Stone