What is causing gas to get into my oil?

What is your question?

I changed my spider injectors put new gaskets on fuel meter body, throttle body and intake manifold. Flushed all the old oil/gas mixture out put new oil and filter. Plus changed my camshaft sensor, oil sending unit. But my oil pressure drops to nothing when I stop, and its steadily rising again on the dipstick and smells like gas. Please tell me what it is that's causing this. Thanks...

What makes this problem better or worse?

Worse after it warms up. Oil pressure begins to drop more when warm

How long has your 2000 Chevrolet Blazer had this problem?

2 months at least trying to figure out the problem