Probably just playing it by the book, Edders, when perhaps a more informal approach and a bit of discretion might have sorted it out.
It's a bit like maybe taking your car for an MoT, and it fails on something that could be fixed there and then. Chances are that it'll still be recorded as an MoT failure.
Sure we've all been there - in fact, have experienced council vehicle inspectors taking very different approaches to stuff like that.
One factor in the report might be that police stopped the cars and they were 'taken to an inspection point'.
If the checks had been LOs only and one-to-one, face-to-face style of thing, then the vehicle might never have been suspended.
On the other hand, the fact that the inspections were presumably a bit more than roadside checks means it's surprising that not very much was found for 14 motors
Which in turn is mabye why they felt the need to suspend for the fixable brake light, and to make it sound worse than it actually was with regard to the car that got the advisory.