There are 18 raw images in the SonyA7S2 sub-dataset and 17 raw images in the Canon700D sub-dataset.
Since the verification code you released selects the picture based on the number, this error will cause the data to be mismatched, and then the wrong verification result will be obtained.
Specifically, since GT is corresponding to a very dark image, the corrector will align the brightness to black, resulting in the PSNR being pulled up to about 70dB.
I hope you can update ELD.7z and explain which version of the data should be used as a benchmark for future works to compare.