I have bought some Linkyo TYOG2 DVD-R and i burned an image at 6x. the scan results show that i have a lot of low pi errors that are grouped together. Compared to other taiyo yuden scans, i have a lot of more pi errors. I am using a laptop burner (PBDS DVD+ - RW DS-8W1P BD1C). The same result happens when buring at 8x too. What could this mean, and how can i lower the Pif/Pi scores?