The hover description for the relic called “Eternal Ice of Amatok” says “Food spoils -25% slower”:

Shouldn’t it just read 25% slower? Because logically (and mathematically) negative 25% slower is actually 25% faster.
Another similar confusing description is for the technology called “Favered Nation”. It reads “-10% Merchant sell prices at the trading post”. I think (but not totally sure) it really means “Merchant sell prices are 10% lower at the trading post” for the goods the merchant sells to you. But then again, maybe the negative 10% means they pay 10% more for your stuff? I don’t know. Besides, considering prices fluctuate, what value is the 10% applied to? I’m totally baffled by this tech.
Another example, the “Convenience Tax” tech. The last part says “Town happiness is reduced by -10%”. Again, I think you mean it’s reduced by 10%, because a negative 10% reduction is the same as a 10% increase.
There may be other examples but those are the ones I’ve noticed.