[Zakizo]

If I had to guess, the only reason Aptitude wasn't counting as adding to base was so that you wouldn't gain additional HP for every 3 points distributed by Aptitude as you do when you distribute stats normally, but still being functionally treated as base stats. With that in mind I agree with the suggestion on poison (in fact it sounds like it may be a bug that poison is ignoring that extra HP), but I disagree with the suggestion for Burn.

Of course I could be completely wrong and they were all just meant to be bonus stats to begin with, in which case sue me.