diff --git a/MissionEditor/TriggerEventsDlg.cpp b/MissionEditor/TriggerEventsDlg.cpp
index a5d6526..7084ab3 100644
--- a/MissionEditor/TriggerEventsDlg.cpp
+++ b/MissionEditor/TriggerEventsDlg.cpp
@@ -435,9 +435,13 @@ void CTriggerEventsDlg::OnSelchangeParameter()
 	int original_cuparam = curparam;
 #ifdef RA2_MODE
 	CString Param1 = GetParam(g_data["EventsRA2"][GetParam(EventData, startpos)], 1);
+	// 3rd position control code
 	CString Code = GetParam(g_data["ParamTypes"][Param1], 2);
-	//MessageBox(Param1, Code);
-	if (atoi(Code) == 2) curparam--;
+
+	// means there are parameters taken up 2 slots, even if only 1 is meaningful
+	if (atoi(Code) == 2) {
+		curparam--;
+	}
 #endif
 	// END FIx
 
diff --git a/MissionEditor/inlines.h b/MissionEditor/inlines.h
index 5fc9856..1ff78ae 100644
--- a/MissionEditor/inlines.h
+++ b/MissionEditor/inlines.h
@@ -88,6 +88,11 @@ inline CString GetUnitPictureFilename(const CString& artSectionId, DWORD dwPicIn
 	return {};
 }
 
+/**
+* @brief Retrieve a stringified parameter from a serialized string, concated with ','
+* @param data Serialized string input
+* @param param Nth param to retrieve, starts from 0
+*/
 inline CString GetParam(const CString& data, const int param)
 {
 	int paramStrPos = 0;