"Why is the second page even being printed? All the information that is on the second page is already on the first page."

Just another crappy way Intuit forces useless things onto us
I report bugs in the help menu that never get fixed
Pretty sad way to run a company

BTW, I got a new Canon G1220 printer that stops and waits for you to interact before it prints page 2 with the useless credit card stuff that we don't need to print

All I do now is click on a button and cancel page two after it prints page one of my Sales Receipt.
You have to set up the printer to always print on two sides of the paper
If you do not do that, QB will just print on a second piece of paper and then that goes in the recycle bin