Index: Ringtoets/Integration/src/Ringtoets.Integration.IO/Helpers/ExportableFailureMechanismSectionHelper.cs
===================================================================
diff -u -r6cf42b92f47cb984c4a2f08936b74b9aba7a4d38 -r548b7cecd2ac4a239dd218c1e675a2c6f2bf4a6d
--- Ringtoets/Integration/src/Ringtoets.Integration.IO/Helpers/ExportableFailureMechanismSectionHelper.cs	(.../ExportableFailureMechanismSectionHelper.cs)	(revision 6cf42b92f47cb984c4a2f08936b74b9aba7a4d38)
+++ Ringtoets/Integration/src/Ringtoets.Integration.IO/Helpers/ExportableFailureMechanismSectionHelper.cs	(.../ExportableFailureMechanismSectionHelper.cs)	(revision 548b7cecd2ac4a239dd218c1e675a2c6f2bf4a6d)
@@ -104,7 +104,7 @@
                     point
                 });
 
-                sectionLengthOnReferenceLine = sectionLengthOnReferenceLine + pointsLength;
+                sectionLengthOnReferenceLine += pointsLength;
 
                 if (sectionLength > sectionLengthOnReferenceLine)
                 {
@@ -118,7 +118,8 @@
                 }
                 else if (sectionLength < sectionLengthOnReferenceLine)
                 {
-                    sectionPoints.Add(InterpolatePoint(lastPoint, point, sectionLengthOnReferenceLine - sectionLength));
+                    double distance = pointsLength - (sectionLengthOnReferenceLine - sectionLength);
+                    sectionPoints.Add(InterpolatePoint(lastPoint, point, distance));
                     break;
                 }
             }
@@ -147,7 +148,7 @@
                     referenceLinePoints[i]
                 });
 
-                totalLength = totalLength + pointsLength;
+                totalLength += pointsLength;
 
                 if (Math.Abs(totalLength - sectionStart) < 1e-6)
                 {
@@ -157,7 +158,8 @@
 
                 if (totalLength > sectionStart)
                 {
-                    startPoint = InterpolatePoint(referenceLinePoints[i - 1], referenceLinePoints[i], sectionStart - (totalLength - pointsLength));
+                    double distance = sectionStart - (totalLength - pointsLength);
+                    startPoint = InterpolatePoint(referenceLinePoints[i - 1], referenceLinePoints[i], distance);
                     index = i - 1;
                     break;
                 }
Index: Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs
===================================================================
diff -u -rc6abf7f3537baaba6e7a6108d115a0c27fd7f4a0 -r548b7cecd2ac4a239dd218c1e675a2c6f2bf4a6d
--- Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs	(.../ExportableFailureMechanismSectionHelperTest.cs)	(revision c6abf7f3537baaba6e7a6108d115a0c27fd7f4a0)
+++ Ringtoets/Integration/test/Ringtoets.Integration.IO.Test/Helpers/ExportableFailureMechanismSectionHelperTest.cs	(.../ExportableFailureMechanismSectionHelperTest.cs)	(revision 548b7cecd2ac4a239dd218c1e675a2c6f2bf4a6d)
@@ -157,16 +157,42 @@
         }
 
         [Test]
-        public void GetFailureMechanismSectionGeometry_SectionStartAndEndBetweenTwoReferenceLinePoint_ReturnExpectedPoints()
+        public void GetFailureMechanismSectionGeometry_SectionStartAndEndBetweenSameTwoReferenceLinePoint_ReturnExpectedPoints()
         {
             // Setup
-            const int sectionStart = 10;
-            const int sectionEnd = 30;
+            const int sectionStart = 2;
+            const int sectionEnd = 4;
             var referenceLine = new ReferenceLine();
             referenceLine.SetGeometry(new []
             {
                 new Point2D(0, 0), 
                 new Point2D(5, 0), 
+                new Point2D(15, 0)
+            });
+
+            // Call
+            IEnumerable<Point2D> sectionPoints = ExportableFailureMechanismSectionHelper.GetFailureMechanismSectionGeometry(referenceLine, sectionStart, sectionEnd);
+
+            // Assert
+            CollectionAssert.AreEqual(new[]
+            {
+                new Point2D(sectionStart, 0),
+                new Point2D(sectionEnd, 0)
+            }, sectionPoints);
+        }
+
+        [Test]
+        public void GetFailureMechanismSectionGeometry_SectionStartAndEndBetweenDifferentTwoReferenceLinePoint_ReturnExpectedPoints()
+        {
+            // Setup
+            var random = new Random(21);
+            int sectionStart = random.Next(5, 15);
+            int sectionEnd = random.Next(25, 35);
+            var referenceLine = new ReferenceLine();
+            referenceLine.SetGeometry(new []
+            {
+                new Point2D(0, 0), 
+                new Point2D(5, 0), 
                 new Point2D(15, 0),
                 new Point2D(25, 0),
                 new Point2D(35, 0)