Liteon 812s with Kprobe

Hi, I have a Sony dw u18a (Liteon 812s) with US0N firmware.
I´m a little confused with this scans.
All burns was in 2.4x in this secuence day after day.
Are this good burns for 2.4x?
It´s strange the behavior of the writer getting worst from a copy to another?

Thanks a lot

They all look exactly the same.

my mistake, this is before.
Looks better than the others.