It's hard to say as I don't know exactly what you mean by "jumpy". Snakes, particularly ball pythons, will quickly retract their heads into their coils if they are suddenly startled. This happens from time to time with almost all specimens. Unless it is a constant thing, I wouldn't worry much about it.
As for the "my ball python isn't in a ball", I would also not worry about it. The "ball" is a defensive posture and some individuals are more opt to show it than others. Personally, I hardly ever see my the ball pythons in my personal collection actually ball up. While it is very common to find a ball python coiled up in their hide, I would find it odd to find one in a legitimate "ball" within their cage.
TLDR: Everything is probably fine. If your ball python is eating regularly, there is often little to be worried about.
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