Because, being the same media from the same batch:
a) The stamper making the discs had an issue & created thousands of defective discs which are bad at exactly the same place
b) Most likely, your burner attempts to recalibrate it's laser on these discs at the same speed, at the same place, and because they are crappy media, it can't correctly recalibrate, and fails the burn.
Have you tried burning with a DVDRW at least? or a different brand of discs?
We provide our time & advice for free. Please try it.
We generally recommend Verbatim (Mitsubishi) or Taiyo Yuden. Both brands arefor the most part consistent and reliable, even the budget versions that make it to open market.