Yes, it is very weird especially given the fact that summarizing Box D transactions is a 100% valid IRS option. It is unclear to me why using this valid option generates lots of problems, forms to be mailed and lots of confusion.
TT should flag this.
If you are going to need to show up at the PO to mail paper forms, just do a paper return (IMO). Nothing more to send no copies, no Form 8483, no confusion about whether you need to send copies of 1099-B's.
