AuCDtect tool reliability

[LF78]

How much is AuCDtect tool (CD authenticity detector) reliable in your experience? Reason I'm asking is because I ripped to FLAC an original CD I own, and the result is that the tracks seems to come from an MP3 master:

I used this tool with many other records and it's usually very reliable, but in this specific case it seems very strange to me.

 

[Veri]

100% means the original was compressed though. Could have been part of the recording/mastering (bad).

 

[LF78]

Could have been part of the recording/mastering (bad).

Yeah, I think so. Hopefully they didn't pass it through MP3 during mastering at least