If it is the same remote mount you used before and it never leaked, then I would check the facing on the mount to be sure it hasn't cracked or has some bur in it that is tearing your rubber seal ring on the filters. I always filled my filters and put
oil on the rubber ring before screwing them on and I never had a leak of any kind. It sounds as if you have already checked to be sure that the
oil exits the filter from the center.
Ron