HI, I'm sorry I ordered the wrong thing

This happens once in awhile, and it just makes me shrug. It also makes me think "what the heck kinda people are out there?" This isn't the first time this has happened. This is the first time I've BLOGGED about it.
Here's the timeline. Make sure you read between the lines, cause there's nothing there :)

• 8/29/06 11:20PM I get notified by Amazon that a software package has sold! Whoo Hoo! It's a tax package. OK cool. I sell a lot of tax software. I'll go get it tomorrow.
• 8/30/06 2:33PM I ship it. It's been ordered Priority, so I make a point to ship as soon as I can. Ordered near midnight, made the next day's mail run. Hand-Slap! Pretty good customer service eh? Wiggle wiggle BOOM BOOM SHISH KA WowZA!
• 8/31/06
• 9/1/06
• 9/2/06
• 9/3/06
• 9/4/06
• 9/5/06
• 9/6/06
• 9/7/06
• 9/8/06
• 9/9/06
• 9/10/06
• 9/11/06
• 9/12/06
• 9/13/06
• 9/14/06
• 9/15/06
• 9/16/06
• 9/17/06
• 9/18/06
• 9/19/06
• 9/20/06
• 9/21/06
• 9/22/06
• 9/23/06
• 9/24/06
• 9/25/06 Whoa! What's this? Package returned? Hmmmm It's marked "Return to Sender", in hand script, not a bad address or anything...appears someone just CHANGED THIER MIND!!!

So let me get this straight Mr. Brian V? You bought a software package, paid to have it shipped Priority, didn't want it for some reason and didn't think to notify me, or even ask if it's OK to send back and expect me to what? Refund your money 100%? Who's going to pay for the shipping? What about the commission from Amazon? What about the fact you've tied up the package for a month and now it's worth less? What about the fact you can't even give me the courtesy of an email?

ANNOYING!!!!