Anything is possible. Try this trick to confirm that the oil is definitely coming from that seal. Wash and wipe the area clean and make sure it is very dry. I even use a heat gun or hair dryer. Spray the area you suspect with a fine powder. I have used baby, foot, even flour for this. Then let it sit and keep checking, it may take a couple of days. You should see a trail in the powder which will lead you to the source. I know this sounds kinky, but it works, we use this to find hidden hydraulic leaks on tractors.