Not sure without another drive to verify the scan it would be hard to tell if it really is a bad burn. Does your drive scan other media ok?
If you feel adventurous may want to try mediacodespeededit and try the MKM003 strategy for your MKM001 disk and see if it burns better. The pies look ok, the pifs seem a bit high. Remember also your scanning at 8x, and not 1x which the BLUR standard is based on. Also your playing your dvd at 1x when you watch it, which means your errors will not be so high. (to compare scans and save time 8x is the recommended speed for benq scans).