Bob, I don't doubt it a bit, but the test should have taken a few days to get the results, eve if done in-house.
And doing cert check is not correct, a complete chemical and physical properties analysis is required and that takes awhile.
Years ago, I used to write material, welding and welder testing specs and had the opportunity to work with some great welders and even they sometimes failed, usually for the smallest infraction.
And Norm, when I was in aerospace, periodic meant yearly, that is, if you still had the material.
I think NHRA is trying to get an arm around the whole process of building fuel cars and until they know what they have, this type re-testing will be the norm.
I expect them to add filler rod to the testing requirement soon.