I'm the same way in that I'll plug cats in to see what it says and whether there is something new/good that I missed. I find that it's getting better for older traits, but can be far too high for ones that used to be new but aren't really going for a premium anymore.
The calculator only uses shown traits and there is nothing there that should be doing that. I'd ask the creator (?????? ?????c ????? (script.hyun)). it's a good idea to let him know when it's buggy so that he can fix it.