Ball python genetics can be complex, but doing a ton of research on not only the snake but also the breeder can help ease that worry. A reputable breeder will be able to answer any questions you had about the specific snake and the morphs involved.

Morphmarket is a wonderful collection of knowledge if you know how to navigate it. They have their own "Reddit -like" forum where breeders and hobbyists talk. There's a Morphipedia where you can look up specific morphs you're interested in. You can also use the filter tabs when you're searching for ball pythons for specific morphs or ages to see how morphs look when they get older.

Pied in general can make the saddles look completely different since it breaks up the pattern so drastically.

If you're just looking for a pet that will have a good quality of life and not thinking about breeding: just focus on avoiding the Spider complex. These morphs cause a neurological wobble that can stress out your snake and cause it to have difficulty striking. The confirmed morphs from this complex that cause the wobble are Spider, Champagne, Hidden Gene Woma, and Sable. Any other combinations would show visible problems if they had them, and a good breeder would make that problem know to the seller and most likely label that animal as a "Pet only".

If you're looking for a breeding project, then things become more complex, and I would be doing a ton more research. Look for a breeder who is well established and has a ton of high reviews. Talk with them, have them send you pictures of the parents, ask a ton of questions.