Clean the rear of the cylinder head up then see where the seepage is coming
from (kind of a normal seepage area)
That small seepage isn't your oil consumption problem.
In a LOT of cases on the BMW oil heads the oil usage isn't as bad as it
seems. The BMW 1100/1150 boxer is a very difficult engine to get good
consistent oil level reading on (especially for newer owners).
A good oil level policy is to NEVER add oil to the engine on the first
or second check. Only add oil if 3 checks at different times show it low.
Also try to always check the oil level in the same place at the same angle.
If your engine was running when you tipped it over then you might find some
of that missing oil in the air box bottom (there is drain valve on the left
bottom rear of the air box)-- open that to see what comes out.