Index: Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.KernelWrapper/Creators/Output/UpliftVanSlidingCurveResultCreator.cs
===================================================================
diff -u -rd11571aac4a3ec206f9a4279369d446859e9edbf -r7b15172a0a20da17f9ba5fed0af36236fee9237d
--- Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.KernelWrapper/Creators/Output/UpliftVanSlidingCurveResultCreator.cs	(.../UpliftVanSlidingCurveResultCreator.cs)	(revision d11571aac4a3ec206f9a4279369d446859e9edbf)
+++ Riskeer/MacroStabilityInwards/src/Riskeer.MacroStabilityInwards.KernelWrapper/Creators/Output/UpliftVanSlidingCurveResultCreator.cs	(.../UpliftVanSlidingCurveResultCreator.cs)	(revision 7b15172a0a20da17f9ba5fed0af36236fee9237d)
@@ -49,8 +49,10 @@
                 throw new ArgumentNullException(nameof(slidingCurve));
             }
 
-            UpliftVanSlidingCircleResult leftCircle = slidingCurve.LeftCircleIsActive ? CreateActiveCircle(slidingCurve) : CreatePassiveCircle(slidingCurve);
-            UpliftVanSlidingCircleResult rightCircle = slidingCurve.LeftCircleIsActive ? CreatePassiveCircle(slidingCurve) : CreateActiveCircle(slidingCurve);
+            bool leftCircleIsActive = slidingCurve.ActiveCircle.X <= slidingCurve.PassiveCircle.X;
+            bool rightCircleIsActive = slidingCurve.ActiveCircle.X > slidingCurve.PassiveCircle.X;
+            UpliftVanSlidingCircleResult leftCircle = leftCircleIsActive ? CreateActiveCircle(slidingCurve) : CreatePassiveCircle(slidingCurve);
+            UpliftVanSlidingCircleResult rightCircle = rightCircleIsActive ? CreateActiveCircle(slidingCurve) : CreatePassiveCircle(slidingCurve);
 
             return new UpliftVanSlidingCurveResult(leftCircle, rightCircle, CreateSlices(slidingCurve.Slices),
                                                    slidingCurve.HorizontalForce0, slidingCurve.HorizontalForce);
Index: Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Calculators/UpliftVan/UpliftVanCalculatorTest.cs
===================================================================
diff -u -r71148524edf9415e4c488bcb41755cd1b3b49fd8 -r7b15172a0a20da17f9ba5fed0af36236fee9237d
--- Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Calculators/UpliftVan/UpliftVanCalculatorTest.cs	(.../UpliftVanCalculatorTest.cs)	(revision 71148524edf9415e4c488bcb41755cd1b3b49fd8)
+++ Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Calculators/UpliftVan/UpliftVanCalculatorTest.cs	(.../UpliftVanCalculatorTest.cs)	(revision 7b15172a0a20da17f9ba5fed0af36236fee9237d)
@@ -496,7 +496,6 @@
         {
             return new SlidingDualCircle
             {
-                LeftCircleIsActive = false,
                 ActiveCircle = new GeometryPoint(0.1, 0.2),
                 ActiveForce = 0.3,
                 ActiveForce0 = 0.4,
Index: Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/UpliftVanSlidingCurveResultCreatorTest.cs
===================================================================
diff -u -rdc126914879ad729a3c46d72b3f09ff283fda8b8 -r7b15172a0a20da17f9ba5fed0af36236fee9237d
--- Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/UpliftVanSlidingCurveResultCreatorTest.cs	(.../UpliftVanSlidingCurveResultCreatorTest.cs)	(revision dc126914879ad729a3c46d72b3f09ff283fda8b8)
+++ Riskeer/MacroStabilityInwards/test/Riskeer.MacroStabilityInwards.KernelWrapper.Test/Creators/Output/UpliftVanSlidingCurveResultCreatorTest.cs	(.../UpliftVanSlidingCurveResultCreatorTest.cs)	(revision 7b15172a0a20da17f9ba5fed0af36236fee9237d)
@@ -73,7 +73,6 @@
 
             var slidingCurve = new SlidingDualCircle
             {
-                LeftCircleIsActive = leftCircleIsActive,
                 ActiveCircle = new GeometryPoint(activeCircleX, activeCircleZ),
                 ActiveForce = activeCircleIteratedForce,
                 ActiveForce0 = activeCircleNonIteratedForce,