Hey, Pete,
I suspect you've solved this problem already, but if you're in Selling Manager Pro and you click on Active (on the left hand menu), then do a search for one of the words in the title (or just scroll through active listings-- don't know how many you have) then it will be there if you've listed the item.
If it's not under Active then it's not up. At least that's my experience.
Shanty