That's a great burn, you have nothing to worry about
I don't tend to read much into PIF totals, more how they're spaced and whether there are big clumps or not. You have a PIF maximum of 2 which is great (specs for LiteOn drives (1ECC scanners) say a max of 4).
Maybe DrageMester or someone can give you a more detailed explanation.
As for the "Recorded by Sony..." bit, that's normal for LiteOn drives and -R media.
Can't answer the 3rd question, sorry. Hopefully someone else can.
Edit: Also, it's good to perform a TRT (Transfer Rate Test) of the disc.