Problem with Jazz bass pickups, the E string loses all bass when humbucking

Hi Everyone
First post for me.
I have an issue I was wondering if you guys on here have any experience with? I have wound my own Jazz bass pickups (North/counterclockwise at the neck and South/clockwise at the bridge). They sound great individually but when both opened up (I have used a blend pot and am referring to the indent position) the E string loses all of its bass. However when I add a little more neck or a little more bridge the bass returns.

Has anyone come across this before?

I was thinking about demagnetising the bridge pickup and reversing the polarities to have both north to see if that has any effect (hoping that the reversed winds will buck any hum).

Hope you can help. Any ideas welcome.
Andy

 

Yes I have a tesla meter that has a polarity testing function The neck ones are all north and the bridge all south.

 

You were right first time... I re checked it and the outer magnet was reversed...I'll get me coat...Thanks for the pep talk though I wouldn't have double checked otherwise