01 Grizzly starter O ring leak

Anyone have a leak from the starter O ring? I didnt change the O ring when i did the recent rebuild. Since then I have noticed there was an oil leak around the starter area where it installs into the crankcase. Pulled the starter and did see that the O ring was deformed and changed it out and wiped everything down. A quick fix ,,,,,,except after riding this weekend noticed still leaking. What gives???