It's not 'attached' to the spider gene, and it is not a separate gene.

It IS the spider gene. Many mutations affect multiple systems in the body. Whatever gene is responsible for the spider morph, it causes pattern, color, AND neurological changes.

Wobbling is not always genetic. It can also be caused by neurological damage during incubation, if the temperature spikes. It's usually recommended not to breed such animals, as it MAY be due to a new mutation that only causes the wobble, but in reality, it is almost always developmental, and would not be passed on. Temperature-spike defects shouldn't be confused for genetic issues. If there's strong reason to suspect a spike, a spike is known, then keep this in mind when evaluating hatchlings.

Some morph genes cause issues. A geneticist would probably be fascinated by these snakes, and I know I would be curious to know what the mutation is that causes both changes in colors and in neurological development or function.

This type of thing isn't unprecedented at all. For example, piebald and albino animals (such as dogs and cats) are prone to deafness, because melanocytes in the inner ear are related to normal hearing. Blue-eyed white cats, for example, are usually deaf--65% to 85% of the time.

It's possible, of course, that blue-eyed leucistic ball pythons are, as well. Testing for it would be an interesting puzzle.