It makes no sense on why it doesn't appear, even in the field description for the account number it says "Appears in the memo of all payments", which obviously is not happening.

It feels like Quickbooks is getting too big, and can't figure out what they want to do, online/desktop. This issue has been going on for a long time and it's sad it hasn't been fixed yet, and I don't want to take the extra step, so my extra step may be to try out another solution such as Xero. I don't know if they are any better, but might be worth finding out.