
Originally Posted by
DigiFluid
It's still an alternate universe. We're just seeing them from different lengths of time away from the branch points. Take There But for the Grace of God, an alternate universe episode involving the Quantum Mirror. There's no deep, fundamental difference in that universe. Humans still breathe air, the galaxy is still ruled by the Goa'uld. But minor differences years before the episode is set (alt Sam not joining the military, alt Daniel being a jerk to Catherine instead of joining up) result in a branched timeline and its own distinct universe.
It's the same principle here, and in every other time travelling episode. Just because we're seeing the result more immediately doesn't make it any less of a distinct universe unto itself.