Well I can tell you that coolant leak is from the Valley pan gasket. And at a rate of a cup/mo, sounds about right. So there is your coolant answer, especially if there isn't any white smoke a sweet spelling odors. And with the oil leaking the CCV valve its self might be failing, or because of all that coolant, might have deteriorated the seals on the valve cover gasket? I know it is hard to see the back of the motor cuz the damn windshield is about a third over the motor, but feel around, take the BMW plastic acoustic cover off and check between the intake manifold. See if you see any oil there.

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2011 E70 50i M Sport