If you do not specify the card number your cards may get grouped (stacked) in the results. This is because we group cards with the same title. The card number is part of the title. Here is an example where different 2014 Absolute cards of Devonta Freeman are stacked in the results. Since there is no limit in the number of cards in the stack a buyer could miss your card.
By specifying the team, your card will show up in search results where the buyer criteria is a team name. Here are two cards but only the left one will be returned if someone search for "New York Mets"
Also, please remember that the team name will show in the results and will be clickable.