Consistently Receiving my paper /mailed bill 3 days before it is due?

Long time customer.  We are elderly people and receive a  paper mailed bill.  

We consistently get the bill in the mail a few days before it is due.   We are outside of Boston, and mail a check to Philadelphia.   We just received our bill today, October 14.  It is due the 18th.

This happens every single month.  The bill date was October 4th, so it took 10 days to reach our mailbox.

Note: There is nothing wrong with the mail up here, we get all other bills in a timely fashion.

This has nothing to do with changing the due date, it has to do with Xfinity getting our bill to us in a reasonable time before it is due, no matter the due date.

What is going on here?  This is absurd.

Xfinity, please inform, this is getting worse by the month.