I mean.....its only a 36 lb bow after all. Did you like the trajectory before you chrony'd it? Sometimes I personally think chronys are more harm then good. All that counts is if you are happy with the trajectory. A 10gpp arrow is only 360gr. You are like at 12gpp.
A person has to give up some distance and speed in going with that light of a bow.I don't think Whips have ever really been toted as speed demons, though they aren't slow by no means. Lighten the arrow to 9gr pp, and see if it's closer.
Honestly those calculators are often wrong.