Welcome to Simplify3D's Forum. Does this happen in every file? Can you maybe share a small g-code file where this is happening? Are you printing with more than one process and extruder?
"A bird does not sing because it has an answer. It sings because it has a song."
dkightley wrote: ↑Mon Aug 27, 2018 5:43 pm
Silly question.....in the print preview window, does the Control Option ( In the middle, bottom of window) show Preview by Line or Preview by Layer?
A count of 67,000 sounds more like lines than layers!