I have checked on this and regardless of weather my item's default options are set to be online or not I get the item to show up in the list.
There might be an issue with the options that you are using or the values for them. Please post back and include some example options for the product so that I can test with your specifics to see if I can get the same problem. This will help us to determine the nature of the issue and how to help you with it.