If you put the top of one pickup against the other and they attract, then they are reverse polarity, if they repel they are the same. The wind is easier to fix, if you wire the pickup in series (ie one pickup black to white), if they have a very clean out phase sound then try reversing them (black to black).
If the magnets are not reverse polarity, then you are stuck unless you want to remagnetise or flip them (neither is easy) :grrr: