Sporadic leak down test results

[patssle]

I ran two leak down tests back to back and got 2 different results on 2 cylinders. I know the engine would be cooler the 2nd time around but one cylinder show better results while the other was worse. Any thoughts to that?

Cyl 1 - 12% then 7% loss
Cyl 2 - 10% then 15% loss
Cyl 3 - 9% then 10% loss
Cyl 4 - 4% then 4% loss
Cyl 5 - 4% then 2% loss
Cyl 6 - 7% then 8% loss