text: Thanks for the report. However, the data seems correct according to your description.
  http://www.openstreetmap.org/way/45468741 has been set to oneway since February 2015. http://www.openstreetmap.org/directions?engine=osrm_car&route=54.58929%2C-5.93583%3B54.58966%2C-5.93259#map=18/54.59058/-5.93421 shows that routing from Donegal Road to Donegal Pass doesn't take a shortcut.
  
  What app are you using ? Are you sure that its map data is up to date ? Are you sure that you selected the car profile rather than the pedestrian one ?