Oil only on one side of engine... help?

Well, I checked the Valve shafts and they ARE on correctly.

Now what do I do?

I didn't thak the shaft off, I just saw that the notch is on the right side where it is suppose to be. The drivers side is pointed down and toward the front of the engine. Should I take the shaft off anyway?

If that is not it, it's a cam bearing covering the hole? How would I go about fixing that?????

I am getting a bit frustrated.

Can I prime the engine with the valve shaft off, too see if there is oil coming up that why? Would that then tell me for sure if it's being blocked my the cam bearing?