That is strange. Are you sure you are using the exact same precheck version?
Is your design proprietary? If so, could you DM me the DRC violations so I can take a look?
This was a benchmark we submitted before applying the manual PDN fixes we always have to apply; the "real" GDS is still chugging along under project CRD2
As for versions, the student generating the full GDS and doing the hand fixes isn't responding. I think he might have fallen asleep (it's 9am here and the team has been up all night fixing a precheck sealring issue)