If things are as bad as this fellow says, an audit will make it clear fairly quickly.
One of the interesting things is that, unlike any of the others that I have seen, actually has a specific name, that of his supervisor, in the affidavit. That at least gives some sort of opportunity to check out part of his story.
One thing I have to wonder about is what the process of these ballot watchers is to report complaints, and if the complaints were recorded. Something that strikes me in so many of the affidavits are statements like, "At some point I saw someone violate the rules by...."
If I were doing the count observer's job, I'm pretty sure I would have a pen and paper with me, and would be writing down, "While observing at Table 16 at 4:04 am, I observed a poll worker run the same batch of ballots twice." Assuming there was some sort of system in place to record that sort of thing, I would make sure to put in an official report.
Maybe they didn't have such a system. That would be rather embarrassing. I've been involved in some pretty amateurish event planning activities, like at Robotics competitions, and we have forms that get filled out to record the occurrence of unusual activities. You would think a group like this would have something similar, but maybe not.
ETA: And, I think I must have clicekd the big grin smiley by mistake, but can't seem to edit it out. Sorry if that causes any confusion.