Yeah, H22N burners can do that sometimes with -R media. These spikes don't appear in all scanners, just like those from NEC burns. But unlike what I experienced with NEC burns (3540 & 4550), none of my players has issues reading discs burnt by my H22N and showing re-linking PIF spikes.
Also I haven't encountered, yet, any of these spikes with +R burnt in my H22N.
As for the scanning speeds, you already roughly know my opinion about it.
I'll try to post, sometime, an extended explanation of my thoughts on the subject, as despite I do favor high-speed scans, there are many traps, peculiarities etc... that already exist with @4X/8X scans and that can be hugely magnified in @12X/16X scans, which tends to make things complicated, and the results misleading in a fair number of instances.
For the very LiteOn model you use, I have no first-hand experience so I don't know if @16X scanning really makes sense. It takes dozens of scans and lots of cross-checking with other drives and players to determine if a given scanning speed is useful, and even so, it depends what one is looking for when scanning... :doh: