mayfer, as has been pointed out above, 'quality score' is calculated by the max PIF amount and nothing else. While that's one important factor, obviously there are other factors to consider such as PIE and jitter levels.
Something that you should know is that Benq drives exaggerate and inaccurately report error levels once jitter approaches 12% and above. In other words, the PIE levels that you are seeing in your scan are almost certainly grossly exaggerated towards the edge of the disc, and you can see how the PIE levels are fine until jitter levels reach around 11% and then they rise along with the jitter. With decent jitter levels it's no issue. If your disc was scanned in a drive with less sensitivity to high jitter such as a Liteon, you'd likely find that your PIE levels would actually be very good.
Are you seeing this gradual 'ramping' of jitter levels towards the edge with most/all of your scans? If you're seeing it with other media besides this batch of TY, then your drive is probably either a poor 'testing' drive, possibly a system-related issue, or it truly is burning with bad jitter levels and is possibly a bum drive. On a couple of other occasions I've seen drives behave such as yours, if I remember correctly it was system related in one case and the drive itself in another case. If your above scan is not typical-looking jitter for most of your other scans then it's probably nothing more than a disc with high jitter.
P.S. - just noticed that you mentioned having an internal 1650 as well. Seeing how it scans in your other 1650 would help a lot in figuring out what the issue might be.