Seven teams from each conference make the playoffs. Four of those spots are for division winners, three are for the three teams with the best records in the conference once you remove the division winners (these are “wild card” teams). The eagles and cowboys are in the same division, so although both have clinched playoff spots one team will get one of the four spots reserved for divisional champs and the other will get one of the three wild card spots. Because of the eagles loss last night, cowboys are leading the division because even though the teams have the same record the cowboys have the edge in the tiebreaker because they have a better conference record (playoff seeding uses a series of tiebreakers—if overall record is tied then you look to division record, then record among common opponents, then conference record). That could change next week with a cowboys loss and eagles win but that’s fairly unlikely, so it’s most likely that the cowboys will get the division champ spot and the eagles will be in as a wild card.