Why is Dallas playing wild card game vs Philadelphia?

Answer 1

The NFL playoffs include six teams from the NFC and six from the AFC: four Division winners and two Wildcard teams from each Conference. These six teams from each Conference are seeded, #1 to #6.

For the NFC, the Division winner with the best record (New Orleans) is the #1 Seed and the Division winner with the second best record (Minnesota) is the #2 seed The Division winner with the third best record (Dallas) is the #3 Seed and the Division winner with the fourth best record (Arizona) is the #4 Seed. The Wildcard team with the best record (Greenbay) is the #5 Seed, and the remaining Wildcard team (Philadelphia) is the #6 Seed.

The #1 and #2 Seeds have a bye in the first round, while the #3 Seed plays the #6 Seed, and the #4 Seed plays the #5 Seed.

That is why Dallas (#3 Seed) is playing Philadelphia (#6) Seed in the first round.