The "leakage" is completely dependent upon how much blow by you are getting. Normal wear of the piston rings allow a a small amount of the high energy gas in the combustion zone to leak by into the crank case. That gas is what creates the positive pressure in the crank case and is vented out through the hose. It carries with it oil vapors. The water vapor in the exhaust and the oil vapors condense in the tube resulting in the liquid you get dripping out. A small amount is normal and what you seem to be getting seems normal to me.
What you are seeing in the exhaust seems to be the result of a rich mixture (my opinion). When you crack the throttle open the engine gets more fuel and the unburned or poorly burned fuel causes a white plume (oil plumes are grey to black). The increased water vapor in the exhaust contributes to the plume even in a well tuned engine. You didn't mention a fuel management system. If you don't have one, I can nearly guarantee that the stock EFI system is enriching the mixture at large throttle openings, even with the BAK. If you have a fuel management system, it may be maladjusted. Or what you are seeing could be perfectly normal.
Don't wanna step on your toes TRaider_John but you got it backwards, a rich mixture will produce black smoke, burning oil produces white smoke.
Step away. In my experience, I stated it correctly. In my observation, while accellerating, gas fueled dragster exhaust is white, diesel exhaust is black. I know diesel fuel isn't "oil" but it isn't gasoline, either. I will agree that a very rich gas mixture will also be dark, but it didn't sound like that was the case here.