I think Delfin is right: Route from 39.52461111 22.55433333 (a few meters NW of tollstation) to 39.52113889 22.55933333 (a few meters SE of tollstation) does not lead through the toll station neither with MFN nor with openstreetmap.org. The toll stations are tagged in OSM as "oneway reversible" and according to the OSM-wiki "Routing engines should not route over this type of oneway without knowing more about the oneway schedule times".
So I think the MFN-behaviour is correct and I also think that the roads at these toll stations are painted and tagged completely wrong in OSM, but that has to be changed by someone with local knowledge.