And the ranger's aim was deadly with the big iron on his hip...
We were subtracting points below zero. Is that incorrect?
Yes, it is incorrect.
Here's a quote from page 17:
If you cannot charge all of the power because it is more than
you would need to move all of the tokens in your power cycle
to area III, you charge only as much as you can by spending
the corresponding number of VP.
If you cannot spend the necessary VP because you do not
have enough, you spend as many as you have and charge the
corresponding amount of power.
You also have an example illustrating this.
The Ivits can afford to spend
only 1 VP. Even if their
structure would normally allow
them to spend 2 VP to charge 3 power, they may choose to
spend the 1 VP they have to charge 2 power.