Because of that, there's no way to enter a monster with a set number of hit points, such as a demon that is listed as having a HD of "20(d4) (110)" You have to enter "20(d4)" because it assigns hit points and designates the creature's Bonus to Hit (BtH).
Entering "110" correctly assigns HP, but results in a BtH of 110. Entering "20(d4) (110)" results i the creature having tens of thousands of hit points.
I mentioned this problem to JPG - dunno if he's planning any action on his end.