1. No that is not normal. Is your oil the correct level and not over filled?
2. Sounds like a gasket leak to me, somethings leaking at least. Clean off all the old oil and gunk and see where it is coming from, might be as simple as the valve cover.
3. Sticking shifter, first thought is it could be as easy as dirt in the pivots (external), or could be be weak shift return springs (internal but not in the transmission, behind the clutch).
1984 Yamaha YT 60 Tri Zinger(current project)
1983 Yamaha YTM 200 (rear suspension kit)..... long term project
2004 BMW R1150R
1972 Honda CT 70
2007 Lifan 110