Exp Loss on Death calculations

Kinda on topic(@ the cannoneer card at least)

 Spoiler

-4%
- snip Cannoneer card -
-7.5%
- snip Ambition -
-2%
- snip Monster Life Undead Power -

 And the death

- snip lost 7.05% -

Notice the EXP from the ambition SS and the death SS.
Either they don't work, or they work totally different from what I(we?) was thinking. s:

The Ambition one is reversed. You start out with -10.0% at 0 Ambition, and max out at -5.0% at level 100. It shows what you lose, not what you save.
But even so, your EXP loss sources add up to -8.5%, so you should only be losing 1.5%, not over 7%.

Maybe they're multiplicative somehow?
7.5 * (1 - 0.04 - 0.02) = 7.05


Edit: Ninja'ed, naturally.
And no, I've never done this particular test...
Rob, did you gain any exp between taking the Ambition SS and dying?
Also, can we trouble you to get a B+ Undead and try again? I don't think I have any chars with measurable Ambition that aren't 200.