Agree with the above, the more subcategories in any category the better. I don't know much about baseball cards, but is there any way to subdivide them by player or year or team? This might help buyers who are browsing to locate exactly what they want.
You can also use Facebook, Twitter and other social media sites to promote your items. You might also want to add a signature link to your forum posts so members can click to view your listings.
If your items aren't appearing in Google shopping and you need to request a store exemption, do contact support:
support@ebid.net as they should be able to help with this.
As far as viewing auctions goes, I've always been able to use the drop down at the top of the listings to switch my views from earliest to newest listed. Granted it doesn't stay that way, as first listed is the default, but one click of the drop down isn't so difficult, especially if buyers are interested in your items.
Oh and welcome to eBid.
Good luck and best wishes for many sales to all,