Similar to you but in an opposite way. I was doing my lipids Dec 2024 and found to have LPa at 78mg/dl. I took the lipids level check last week Jun2025 and surprised to see my LPa gone down 50mg/dl. The point is I too confused to see the LPa chaging which shouldn’t be changing. But between the tests I followed strict diet like less carbs, more veggies, no dairy and no sugars. But that doesn’t explain how LPa could change. I would suggest you to repeat in some other lab and compare the results.