PVChecker not showing proper output

the output of the PV checking seems to be broken in some categories (close, clones):

All                  :  0.92 (    48/    52)
Isolated             :  0.92 (    48/    52)
Close                :  0.00 (     0/     0)
False rate           :  0.00 (     0/    48)
Real false rate      :  0.00 (     0/    48)
Clones               :  1.02 (    48/    47)