text: Hi,  
  this is an error in the navigation software, not in map data. What app are you using? For me, OsmAnd behaves the way you describe, while http://maps.openrouteservice.org ignores the turn restrictions completely and finds the shortest route (which is wrong too). It might be worth contacting the authors/maintainers of the navigations software as I don't expect the turning circles to be well supported.