Not sure whether this decision by GIRoA is unprecedented, but it does indicate achieving a SOFA maybe difficult:
The Afghan president has ordered US special forces to leave Wardak province within two weeks. The decision was being taken due to allegations of disappearances and torture by Afghans considered to be part of US special forces, said a spokesman for Hamid Karzai.
Link:http://www.bbc.co.uk/news/world-asia-21566295 and a longer NYT article:http://www.nytimes.com/2013/02/25/wo...pagewanted=all