I was informed by my doc that high lipase and a normal-ranged amylase together is insignificant(=nothing wrong). so having high lipase is fine?

It depends: How do you FEEL? Lipase is a test fraught with pitfalls in its performance, and reference ranges are set for most lab tests so that several percent of healthies fall outside on either end. If you have serious abdominal pain and a lesion in your pancreas, I'd worry that your low amylase is an error. If you feel well, I'd forget the lipase.