AWS D1.1 states that only one half at a minimum has to be RTed. If your company decided to RT 100% of the pipe, they chose to meet and exceed the code.It would have been cheaper to just RT one half instead of 100%.If the pipe was RTed by code you had a 50/50 change of not having this problem.

I do not know what side the welder welded first.Did he/she weld the unsatisfactory weld first then welded the side with satisfactory results.Or was it the other way around(the good weld then the bad weld).
I would still fail it either way because I know to much to pass it.

If I give a welder a 2G test on 1" plate. I UT it before I cut it and bend it.I know where the 2 places that I have to cut out and bend are located.If those 2 places pass UT but the weld has a defect that would fail it per UT,I never cut it and bend it.

If you pass the welder of the pipe and I pass the welder of the plate,are we doing ourselves any good. If the pipe and plate welds were in production they both would have failed, which will cut into the profit.I want the welder to pass the WQT and I want it to pass as if it was in production.That saves me a couple of headaches down the road.

If you ordered a pressure vessel that required spot radiography, and the fabricator kept taking x-ray shots and threw out the bad and kept the good, until he satisfied the requirements for number of acceptable radiographs...would you put it next to your office?