Score higher, than should be?

[grray]

I checked attached file (128 kbps mp3, uploaded to youtube) and this tool gave score 83, which is better, than it should be. File spectrogram has two cutoffs, one at 20khz from youtube 160k opus, and one at 16khz, from mp3. So i guess this tool detected 20khz as cutoff, and gave good score. I'm not sure if this program is designed to evaluate audio encoding quality in such cases, as it is not lossless, and it is double encoding, but if it is, I hope this report will help improving it. Youtube-Rvz4wUFo99M.zip