There is only one known cornsnake albino gene, if you're talking amelanistic. Anerythristic is sometimes called black albino, though.
But as far as regular albinos go, if you breed albino to albino in the cornsnake world, you'll get all albinos. The only thing is, there are line-bred variants of albino: candycane, sunglow, and reverse okeetee. If you cross a candycane with a sunglow, you'll still get albinos, but the offspring won't look quite like either parent, as an example. So is there only one kind of albino? Depends on how you look at it. There's only one gene. There's multiple phases.
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"You keep WHAT in your freezer?"
"Mice. And rats. If that bothers you, I can call them 'cows' instead."