You should not be able to turn any summons (from the Summon Monster spell) into an Animal companion. It's a bug that I am correcting. If you have one of these super soldier companions, please get rid of it.
Thanks and happy gaming!
[6:22 PM] farglenargle: in fairness to you, it is rather arcane and esoteric and since you're a paladin, you're much better with the divine than the arcane
I don't always accidentally, but when I do, I accidentally the whole thing.