Right. Carbon 14 measurements are incorrect unless they support the presuppositions of evos. That's scientific!
It appears the paper is not published or peer reviewed. If it had been, the referees would undoubtedly have told the authors to examine the possibility that 14C might be produced endogenously at low levelswithin the earth by nuclear transmutation reactions, and to estimate the rate of such production. The referees might also have obligated the authors to point out that the levels of 14C are still extremely low, compared with 99% of the material used for radiocarbon dating.