diff --git a/NetworkSync.cpp b/NetworkSync.cpp
index 76f6943..3fa7dcb 100644
--- a/NetworkSync.cpp
+++ b/NetworkSync.cpp
@@ -9,8 +9,8 @@
 void NetworkSync::SendVector3(unsigned char *data, unsigned int &startIndex,
                               const Vector3 v) {
   SendSingle100(data, startIndex, v.x);
-  SendSingle100(data, startIndex += 4, v.y);
-  SendSingle100(data, startIndex += 8, v.z);
+  SendSingle100(data, startIndex, v.y);
+  SendSingle100(data, startIndex, v.z);
 }
 
 void NetworkSync::SendQuaternion(unsigned char *data, const int startIndex,
@@ -19,7 +19,7 @@ void NetworkSync::SendQuaternion(unsigned char *data, const int startIndex,
   int ix = startIndex;
   SendAngle(data, ix++, angles.x);
   SendAngle(data, ix++, angles.y);
-  SendAngle(data, ix, angles.z);
+  SendAngle(data, ix++, angles.z);
 }
 
 void NetworkSync::SendQuat32(unsigned char *data, int startIndex,
@@ -46,7 +46,7 @@ void NetworkSync::SendAngle(unsigned char *data, const int startIndex,
   data[startIndex] = packedAngle.GetValue();
 }
 
-void NetworkSync::SendSingle100(unsigned char *data, const int startIndex,
+void NetworkSync::SendSingle100(unsigned char *data, unsigned int &startIndex,
                                 float value) {
   // Sends a float with truncated 2 decimal precision
   Int32 intValue = value * 100;
@@ -56,10 +56,10 @@ void NetworkSync::SendSingle100(unsigned char *data, const int startIndex,
   // }
 }
 
-void NetworkSync::SendInt32(unsigned char *data, const int startIndex,
+void NetworkSync::SendInt32(unsigned char *data, unsigned int &startIndex,
                             Int32 value) {
   for (unsigned char ix = 0; ix < 4; ix++) {
-    data[startIndex + ix] = ((unsigned char *)&value)[ix];
+    data[startIndex++] = ((unsigned char *)&value)[ix];
   }
 }
 
diff --git a/NetworkSync.h b/NetworkSync.h
index e7a8fbd..dac812b 100644
--- a/NetworkSync.h
+++ b/NetworkSync.h
@@ -50,8 +50,9 @@ protected:
   NetworkPerception *networkPerception;
   void PublishTrackedObject(SendBuffer sendBuffer, InterestingThing *object);
 
-  void SendSingle100(unsigned char *data, const int startIndex, float value);
-  void SendInt32(unsigned char *data, const int startIndex, Int32 value);
+  void SendSingle100(unsigned char *data, unsigned int &startIndex,
+                     float value);
+  void SendInt32(unsigned char *data, unsigned int &startIndex, Int32 value);
   void SendAngle(unsigned char *data, const int startIndex, float value);
   void SendVector3(unsigned char *data, unsigned int &startIndex,
                    const Vector3 v);