To be fair, there is some ambiguity with the chart, since "subrace" can refer both to an actual subrace (elf -> wild elf), or the mechanical subrace (halfling -> goblin).
I think what happened is that at one time the chart was correct for both meanings, but the ages have been tweaked for some of the mechanical only subraces, and the chart has not kept up. For instance, I'm positive that half-giants live a little longer than half orcs for example, and I'm pretty sure that goblins live shorter lives than halflings.
I'll make a note in the LORE forums to address the issue, thanks for bringing it up.