You got it! As long as there aren't more than two allelic genes on the same locus, the sky is the limit with the number of morphs in a snake. So you could theoretically have a mojave lesser GHI fire yellow belly banana enchi cinnamon calico pastel... etc.; it's just extremely unlikely to hit on that many morphs in a single snake.
You could also have more than one super/ALS in a snake if they're from two different complexes, such as a super pastel ivory. All hatchlings will be pastel yellow bellys. You just couldn't get a super pastel ivory specter, because specter is in the yellow belly complex.