If I had to venture a guess, your aftermarket oil cap is seaping a bit of oil. The alternatives are less fun but not really detrimental to the life of the motor. If you've got so much blowby that you are overloading the PCV system, that sucks, but the engine will just keep on ticking.
Adding an edit ... that leaking cap would account for the fluid in all of your images.
Adding an edit ... that leaking cap would account for the fluid in all of your images.
