JOEPA has this one down pat.

Draw length does not change because of the use of an overdraw, etc.. With many releases you can adjust the position of the trigger/release shaft so that you don't have to majorly adjust anchor points when switching from fingers to a release....at least in relation to draw length.

I am not sure what the Easton Chart is recommending as I have not looked at it for correct arrow length in some time. However, if you are using a release then I would suggest taking the "true draw" measurement and adding an inch. That should provide adequate arrow length.