I am not sure if this is intentional, but it is currently possible as a sorcerer to take the reduce maximize cost twice in one tree for a 18 SP discount, you can also take it twice more in a second savant tree to have a reduction of 24 SP. This means that you can cast maximized spells for one more than the initial cost.
If you take it 9 times total (a reduction of of 27) it does not cost anything to maximize your spells (I was wondering if your maximized spells would cost 2 less than base, but it maxes at -25).
Not sure if this is WAI but it seems pretty neat.
Even if taking it twice on the same tree is a mistake, one could take it on three separate savant trees if they wanted.