from the text it seems like a cable was different between experiment and the validation process. Thing is, they did a further (bunched) experiment two months la

from the text it seems like a cable was different between experiment and the validation process. Thing is, they did a further (bunched) experiment two months later, and there it was wrong again? I have a bit trouble believing that chain of events. Seems more likely to me that someone wasn't careful when checking it in between these experiments.