Jetted properly or not for those of us riding a "B" level and below spooge is our friend and a fact of life. Neat thing these days given advances in oil chemistry more often than not the spooge flows opposed to carbon coating the power valve closed. No, unburned oil should not come out between the cylinder and pipe... if so your loosing a bit of power. New o-rings, copper, or whatever with a tweak here and there will fix that. Spooge out the power valve vent is common. Jetted properly it is virtually unnoticeable a drip here and their at the most. Run low in the R's and the spooge can become excessive... again, for most of us this is better than no spooge at all.
Way I see it, your question pretty much says you don't ride at 10,000r's and up... thus don't worry about the spooge thing and have fun.