Any idea why there are four weakness cards in the expansion, when there are two of everything else?

If they are supposed to add to the basic weakness deck for drawing at the start of the campaign, four seems like overkill.

If you play through the scenario, you'll know why (basically, there's one for each of up to the maximum of four players).

They're not basic weaknesses. They aren't called that, and they have the Essex County Express icon in the middle instead of the basic weakness icon.

Ah, thanks. I'd missed the icon.

Better go take them out of my weakness pile. I'm finding organizing my cards to be a bit challenging.