The case AcREMOVEALL in method mitkPiointSetInteractor::ExecuteAction() does not set the return parameter so false is returned from the selected (this) statemachine. GlobalInteraction then fills the list of possible statemachines and asks this statemachine again. In both cases the actions were successfully executed.
This bug slows down the interaction of the statemachine pattern singlepointinteractorwithoutshiftclick and of all other PointSetInteractor patterns that call AcREMOVEALL.
Bug can be resolved by setting returnparameter "ok" to true after removing all points.