As of this moment in all of my games, AI Eyes are spawned on around 60 of all the 80 planets. This really makes the game feel repetitive cause you always have to deal with the planets in the same manner.
60 out of 80!?
That is WAY too much. The number spawned per map is
supposed to much, MUCH lower. What version are you playing on? I think there was a version where the spawn rate of the AI eye was about double what it should of been.
Also, what difficulty are you playing on? The spawn rate goes up as the difficulty goes up IIRC. However, even for 2 level 9 AIs, 3/4 planets is too high. I think the expected rate (for around level 7) is closer to 1/4.
Normally, I would chalk this up to an unfortunate seed you got and remind you that low probability only means low counts on average, not in every case; you might of gotten an "unlucky" seed. However, there are two holes with this theory. One, I think the rate is an exact number to be spread across planets, not a chance per planet. Two, you mentioned you got this for several games. Such rates happening consistently outside of expected ranges over multiple tries is most certainly suspect.
I have to say though, I do not see this in my games. In my games, it is much closer to the expected 1/4.
EDIT: As chemical_art pointed out (and ninja'd me with), the number of AI eyes is also dependent on AI type. The defensive AIs, especially the turtle types, have a much higher spawn rate (again, IIRC, 1/3 for a level 7 turtle). However, even two level 9 turtle AIs I think should have a rate closer to 1/2, and I highly doubt you would torture yourself trying to fight 2 high level turtles.