Most likely the min and max size can be overriden by setting a planet as habitable. Several of the systems have those and some starting system have habitable moons as homeworlds. You may have to remove the presetted habitable moons to ensure your setting works all the time.
Yes, it seems that solar system initializers were overriding it. Thank you.
It is strange though. The initializers had a standard block for "gas giant with moons" that set moon size from 8 to 20. But it did not set class for the moons, that must be random.
I would have expected that either it would set actual size in the intersect of two limiters (initializer and planet class), or put size based on initializer and then check it against random class chosen.
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