I don't know what your current PCV valve setup is, but you might check the current condition of that valve in case your crankcase pressure isn't being properly vented. Building up excess pressure would have your oil looking to escape from the pan wherever it could, including past any seals/oil pan bolts that weren't properly torqued.

If that were the case, it might look like the oil is leaking from somewhere above the pan, but could actually just be oil that's getting blown upward from the gasket area from the wind as you drive.

One simple possibility anyway.