Hi Ricky, welcome to Outdoorking.
Your problem is an unusual one, at least in my experience, but you have described it very clearly and the description seems to suggest a starting point.
When you have the flywheel removed, you will see the Positive Crankcase Ventilation valve compartment - you have already referred to looking inside that housing. Your description of the problem suggests that it may come from that area. There should not be liquid oil in that compartment. Some of the ways it might get there are:
1. Excessive blow-by past the piston rings would carry oil from the crankcase, through the PCV valve, into the compartment. The system is not capable of dealing with much volume of oil, so some of it might then be forced past the cover gasket. If this is happening, the solution would be new piston rings.
2. The tiny (1.8 mm) drain hole from the compartment back into the crankcase might be blocked. You should check for this by pushing the tip of a 1/16" drill bit through the drain hole from above, then retracting it.
3. The mesh packing in the compartment might be clogged with crud, making the drain inaccessible and flooding the compartment.
4. The synthetic rubber breather hose that joins the compartment to the air cleaner housing might be blocked. This would pressurise the compartment and result in oil mist passing the cover gasket.
5. The brown fibre/phenolic disk in the compartment, which is the actual PCV valve disk, might be worn through, resulting in stronger puffs of crankcase gas and oil mist into the compartment, possibly leaking past the top cover gasket.
I suggest you focus on the PCV compartment at this stage, checking for those five possible faults, and report what you find.
