There's 2 seals for the crank man, rear main seal and front main seal.
Also I don't really understand how its possible for the seal to do that. rb30's that I have taken apart with 450,000 ks on them do not have any signs of wear around the front or rear main seal area, just doesn't happen.
So yeah more info, and even then if it is worn for some obscure reason, I would recommend fixing it properly, and if that involved motor out, then so be it.