I think the misleading aspect in this case is that when looking at the 800k view, it seems that CO2 levels have doubled (or more) compared to previous peaks, whereas it's actually a ~30% increase. It's still a very significant increase, and should be shown accurately.
The inverse of a 33% reduction is not a 33% increase. It is a 50% increase. In other words, humanity has added half of the preindustrial CO2 level on top of the preindustrial CO2 level.
What you probably meant is that 33% of the CO2 in the atmosphere is "man-made".
