I think all of the %s are off and not just YTD.  It at first looks like that the summary chart doesn't take into account todays pricing but the math still doesn't work out. I'd love to know how this math works

I noticed if you go to the advanced chart you'll get different %'s.  It's confusing and can be wildly different. Maybe the advanced chart is accurate? Of course on mobile you can't get the advanced chart.