|Ed Girallon Poe|
Do you have a reference for that? Not saying you're wrong, but most interpretations I've seen went the other way.
Core Rulebook, Pg. 12 under heading "Multipling" wrote:
When you are asked to apply more than one multiplier to a roll, the multipliers are not multiplied by one another. Instead, you combine them into a single multiplier, with each extra multiple adding 1 less than its value to the first multiple. For example, if you are asked to apply a ×2 multiplier twice, the result would be ×3, not ×4.
Bold is mine. The rule only ever specifies what to do with multipliers on rolls, making an an acceptation altering normal math for the game balance. If a roll is not involved, normal math takes precedence.