gpg --list-sigs D0123E63 shows 20 signatures but 14 of them are bad as can be only verifieed by gpg --edit D0123E63 followed by a check.
Such signatures points to a manipulated key so this issue should be showed very obvious on the key listing!
How To Repeat
gpg --list-sigs D0123E63
gpg --edit D0123E63
gpg --search benoit panizzon