One thing that I've noticed, is that the sheet sometimes gets confused if I make a bunch of changes at once. For instance, if I have a level 12 Wizard and change it to a level 12 Warlock, it might leave it some of the Wizard class text or it might miss some of the Warlock class text. It's always random when it does happen so I don't think there's anything you can do about it. This is more or less a warning for others: be sure to save a copy of your sheet in case something messes up when you are experimenting with changes. 
Keep up the awesome work, MPMB!

Keep up the awesome work, MPMB!