DuskEagle: The same end result is marked "correct" when reached via one variation and "incorrect" when reached via another.
When oriented at the bottom, N1M1L1O2R1M2 is marked "incorrect", but results in the same live shape as the correct variations.
yaya: I don't see any possibility to save the main group including part D18/D19. There are solutions to sacrifice these two stones and live with the rest, but this is signed wrong.
That's because opoonent's response at C19 should be at G19 instead, I will fix it.