Rear Hub Seal/Leak 3!

[fordlovr]

so I have a leak coming out of the left rear hub, Checked diff oil level and about half a cup of oil came out. So it was overfilled! Anyway took hub off and bearing full of oil and oil all over brake shoes. So will get new linings. Looking at the hub seal ,you will see a small nick, not sure if I did that when I took it off, so will replace it. There doesn't seem to be snap ring there and the Bearing moves fore and aft about 1/4 inch. Is this normal? Any other tips will be appreciated. P.S. Someone has told me to get the drum looked at as it will be soaked with oil!! Cheers