They are probably upset that some batches weren't as "effective" in obtaining the desired results. This can also be used to gaslight people into thinking that there were just a few "bad" batches, when the reality was that they were all toxic, just that some were more acutely toxic than others. The manufacturing process (process 2) guaranteed that, including the presence of DNA fragments and SV40. At this stage, it would be safe to assume that all actions of those involved are to obfuscate or shift blame for their complicity.