You're getting upset over nothing. Really, you are. There is a LOT to get upset at TSA et al. over, but all this hurt the anti-TSA case.

It's 10 vs 14. Neither is significant, neither matters. All measurements have errors, if a source is claiming otherwise you best assume they are not educated very well on science - and have not done a good job communicating with the scientists making the measurements. So as far as anybody is concerned, the difference between 10 and 14 is so insignificant it may as well be less than 10.

I don't know about the people you're responding too, but for me it's less about broken promises and more about incompetency. I would be almost as angry if the number were 6, when they promised that they had done proper testing of the equipment.

That was my mistake. The author of the piece said that the scientists responded saying their measurements have a large margin of error (Unfortunately, he doesn't tell us exactly what they said).