I believe this problems source lays in the fact that Guidance is rolled pasively (before our roll), and not actively as our d20 ...
If we would roll them both simultaneously (as i allready sugested few times) it would be simple math Result 1 + Result 2 gets Number that is compared to Roll Target. :-/

And it would look better. :P


I still dont understand why cant we change Race for our hirelings. frown
Lets us play Githyanki as racist as they trully are! frown