That would be how to transfer your extra tickets, but I think in order to use the account owners ticket you'd need to give someone your login info and have them pull the barcode from the mobile site.
Huh... that doesn't make sense to me. I don't see why when you buy 4 barcodes they wouldn't all be listed and all able to be sent. Why would there be a difference? I can't see why they would "lock down" one barcode. I guess they have their reasons if that's the case.