that did sound funny, its a morph, not sure the exact combo. Snake a + snake b = snake c. Snake c is the bad combo. Its like carpets and Jags, the jag component makes the snakes haywire, neurological problems.
No. It's not a combo. It's a base morph. A calico ball python is a pretty common single gene animal with no known issues. They grow and reach adulthood just like any other. The person you were talking to is "less than an expert".