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Philadelphia finished ahead of Chicago by virtue of a better conference record (25–27 vs. Chicago's 24–28; the teams split their regular season series).
With three teams tied for #2, the tie between Denver and Portland was broken first, since it determined a division championship. Since Denver finished ahead of Portland by virtue of a better division record (12–4 vs. Portland's 11–5; the teams split their regular season series), they won the tiebreaker. Since San Antonio's seeding can't be affected by the tie between Portland and Denver, Portland was relegated to the #4 seed, and the tie for #2 was "re-broken" between Denver and San Antonio.
Denver finished ahead of San Antonio by virtue of winning their regular season series 2–1.