It looks odd, doesn't it. But you'd probably find it's actually a northerly or southerly crosswind for both runways, perhaps slightly more easterly for one and westerly for the other. And you may also find that the 'overlap' doesn't last long as one airport or the other is about to change the 'active' runway from 09 to 27 (or vice versa). Which isn't easy when you've got a lot of traffic stacked up for landing!