Bug A isn't a bug, it's the way it's designed. If you mouse over
"Select Bonus" a cell comment pops-up:
At the indicated levels these cells will become light
yellow indicating you can select them. You are entitled
to have two of your ability scores bumped up by one
point each at these levels. At these levels the two
choices you make must be different. For example, at
4th level you could choose Strength and Dexterity, but
you cannot choose Strength and Strength (and if you
do the system will only add the bonus once anyway).
Bug B, good catch, that will be fixed soon.