Mainly the home page by default will show the category but is also the main trader page that show all your trader. So for instance if you want to create trader AUTO categ, you would need to click on the trader tab and then the autograph atribute and you have the trader auto and all auto in the trader section will be showing :
So once you selected what you wanted then you can create that group.
Next you want to create Trader memorabilia, click on the home page link to reinitialise the query, by default the home page is also the trader tab. It show categ only if you have any or all trader. Make sure you have no selection in blue on the top left section
If empty, now just select memorabilia.
Now you can create the memorabilia trader categ.
You want a set "2011 Topps Chrome"
Click on the right Home Page link to reinitialise it and if you need a text search, always do this first as this will erase any Current filter. So do a search of "2011 Topps Chrome"
Then select football on the left filter section, then select the year range "2010's" and then select 2011. That should be enough to create the group.
In one work you need to select what the category should sow in order for the card to show up in it.