What you just said doesn't make any sense and is a post-hoc rationalization besides.

The start and end points are the same between the two graphs.

Actually they are not. The starting numbers (1980) differ between the two charts by ~500,000 deaths.

To say that this nitpick throws shade on the entire project is a bit overstated.

My very first search on the data came up with this. I suppose I could have kept searching but that puts me personally at a 100% error rate. Maybe I'm just really really unlucky, though.