Do I have a bad batch of media?

I recently purchased some MAM-A Everset printable media for a project and did some test burns at different burn speeds and scanned for error rates and noticed a pattern whereby I would repeatedly get a couple of spikes of C2 errors in the exact same location on the CDs in multiple burns. To me this appears to be a defect. I tested in two different drives and got the same pattern. Any comments?

Hmm could you put a picture up and what testing speed did you use ?
I have seen disc’s reporting excellent results up to 40x on multiple testers. While pushing it over 40x would give me C2 spikes and weird rises in C1 errors.