Outer Limits 4x4 Board

I have changed the inner tube axle seal twice and its still leaking. I bought the seals (left and right) from a bearing shop, are they different from Nissan? Is the left and the right the same seal?
And yes i made sure i did not damage seal when putting in axle and i checked breather also.

Have heard it say that if axle is bent then it don`t seal but I think I would try the Genuine Nissan seals first. My knuckle joints were leaking badly and Genuine axleshaft seals cured it.
Alex