negative values in DBR editor

I editing the starting weapon to give it

  • to characterOffensiveAbilityMultiplier
    and
  • to characterDefensiveAbilityMultiplier

it worked as expected when the defensive was -1
but went crazy when I made it -10

am I not editing the correct field ?
do negative numbers not work ?

Fixed that for myself, before I had 0.9 but should have written 90.0