This is a 3 piece (pancake core) ball. With these, thumb weight and negative side weights generally have a much greater effect on a ball's reaction. One effect is that negative side weight and thumb weight can bring a track up slightly higher than it normally is. Side weight and finger weight lower it slightly. If you normally track high as you inidcate, I believe the thumb weight could be raising the track just enough to track over it.
2 piece core (dynamic core) balls like the Diesel will not be affected as much by thumb/side/finger and top weight. It is affected more by pin/CG/MB placement.
I hope some knowledgable driller, like king of the mill or others, can corroborate this.
I suspect that if you drill your thumb hole deeper to remove the thumb weight
or at least some of it, that may lower the track enough.
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