That would be true for all of the counts, not just Zen. So the question isn't answered. For example, Hi-Lo edge for the TC = 0 bucket is -0.27% for the rules indicated, so I would say there's something weird going on. Zen shouldn't be better than any other count at TC = 0.
Just looked at my CVCX, and it showed a -0.21% edge for Zen 4.5/6 decks, full indices, S17, DAS. Have no idea what you may be looking at. Screen shot, please.