Ah, its distributed by team rather than per player. Two teams will always be in the same system.
There, he's explained all your screenshots. So here's what he meant:
1. If non-locked teams is enabled, and the game starts as an FFA, then everyone is considered to be a team of 1.
2. The pairing algorithm puts at least two "teams" in each solar system. Hence, if there are only two teams, then two teams of
any size will all end up jammed into a single solar system.
3. If there are three teams, they might still end up in the same solar system (at least, this is from the screenshots posted above).
4. If there are four teams, e.g. 2v2v2v2 or 1v1v1v1, then you'll have two solar systems occupied at start: each with two teams.
Basically, the algorithm ensures that everyone starts with at least one opponent player in their solar system, and it puts everyone on the same team in the same solar system to start out with. I'm sure people will want to tweak this distribution, so of course we now look for Blair's comment about "options" to come to fruition in Beta 3....

Regards,
-allquixotic