diff --git a/glib-core/ds.h b/glib-core/ds.h
index 90c525680..c8fa63146 100644
--- a/glib-core/ds.h
+++ b/glib-core/ds.h
@@ -1059,7 +1059,18 @@ template <class TVal, class TSizeTy>
 TSizeTy TVec<TVal, TSizeTy>::AddVMerged(const TVec<TVal, TSizeTy>& ValV){
   EAssertR(!(IsShM && (MxVals == -1)), "Cannot write to shared memory");
   AssertR(MxVals!=-1, "This vector was obtained from TVecPool. Such vectors cannot change its size!");
-  for (TSizeTy ValN=0; ValN<ValV.Vals; ValN++){AddMerged(ValV[ValN]);}
+  TVec<TVal> ValV2;
+  for (TSizeTy ValN=0; ValN<ValV.Len(); ValN++){if (!IsInBin(ValV[ValN])) {ValV2.Add(ValV[ValN]);}} ValV2.Merge();
+  TVec<TSizeTy> ValNV; TSizeTy ValN=0;
+  for (TSizeTy ValN2 = 0; ValN2 < ValV2.Len(); ValN2++){
+      for (; ValN<Len(); ValN++){if (GetVal(ValN) > ValV2[ValN2]){ValNV.Add(ValN); break;}}}
+  TSizeTy EndValN = Len()-1; TSizeTy OutValN = ValV2.Len() - ValNV.Len();
+  for (TSizeTy N = 0; N < ValV2.Len() - OutValN; N++){Add();}
+  for (TSizeTy N = 0; N < OutValN; N++){Add(ValV2[ValNV.Len()+N]);}
+  for (TSizeTy ValN2 = ValNV.Len()-1; ValN2 >= 0; ValN2--) {
+      const TSizeTy & BegValN = ValNV[ValN2]; const TSizeTy OffSet = ValN2+1;
+      for (; EndValN >= BegValN; EndValN--){GetVal(EndValN+OffSet) = GetVal(EndValN);}
+      EndValN = BegValN + OffSet - 1; GetVal(EndValN) = ValV2[ValN2]; EndValN = BegValN - 1;}
   return Len();
 }
 
diff --git a/snap-core/cncom.h b/snap-core/cncom.h
index 5b1040597..cab395650 100644
--- a/snap-core/cncom.h
+++ b/snap-core/cncom.h
@@ -73,7 +73,7 @@ class TCnCom {
   TIntV& operator () () { return NIdV; }
   const TInt& GetVal(const int& NIdN) const { return operator[](NIdN); }
   void Sort(const bool& Asc = true) { NIdV.Sort(Asc); }
-  bool IsNIdIn(const int& NId) const { return NIdV.SearchBin(NId) != -1; }
+  bool IsNIdIn(const int& NId) const { return NIdV.IsIn(NId); }
   const TInt& GetRndNId() const { return NIdV[TInt::Rnd.GetUniDevInt(Len())]; }
   static void Dump(const TCnComV& CnComV, const TStr& Desc=TStr());
   static void SaveTxt(const TCnComV& CnComV, const TStr& FNm, const TStr& Desc=TStr());
diff --git a/test/test-cncom.cpp b/test/test-cncom.cpp
index c867c5989..f4b7fe6c0 100644
--- a/test/test-cncom.cpp
+++ b/test/test-cncom.cpp
@@ -113,6 +113,10 @@ TEST(CnComTest, UndirectedDisconnected) {
   EXPECT_TRUE(SCnComV[1].Len() == 2);
   EXPECT_TRUE(SCnComV[2].Len() == 2);
 
+  for(TInt ValN = 0; ValN < SCnComV[2].Len(); ValN++) {
+     EXPECT_TRUE(SCnComV[2].IsNIdIn(SCnComV[2].GetVal(ValN)));
+  }
+
   double MxSccSz = GetMxSccSz(G);
   EXPECT_TRUE(MxSccSz > 0.86667 - EPSILON && MxSccSz < 0.86667 + EPSILON);