It appears that I am collecting a small amount of what appears and smells like transmission oil in the bottom ot the air filter housing. Could be crankcase oil. Any thoughts??

thats engine oil this is what happens when you put too much oil in ...excess gets blown into air cleaner ....cool huh?

Also happens if you've been upside down, trapped under the bike with the engine still going before the angle cut out takes effect. It's not a problem (the oil that is, being upside down could be)!