Don't feel bad Moosan, I had this with Sedo from 2004 to about 2008 and they are a joke. They are a joke because they never put this as a top domain, they never worked to sell it even when I offered a fee for that service, and when anyone came with an offer close to reality their contracts were insane. I used to park with them too and they were good at first and then became losers. So, they lost me. Specially because they started to farm out the sales and add the percentages onto sales. So, eventually it was costing over 25% for their sale plus 15 percent off the top for transferring the money.
I opened my own account at Godaddy so they would stop adding 15 for go daddy to send sales over to their already 20 percent (making it 35% of the sale for the goofballs).
My suggestion is to go over to godaddy and get an auction account for under 5 bucks a year and put all your domain listings there. If you are still at stiffo, then make sure you are not letting them list it on other sites (like they do with godaddy, Afternic, etc.).
The reason these stupid sites get picked is that SOMEHOW means there is a buyer interested and it becomes a dog and pony show. It once happened with me and palmreader.com - showed me the underbelly of the beast.
Good luck!@