diff --git a/alignment.cpp b/alignment.cpp
index 294e62e..e0da274 100644
--- a/alignment.cpp
+++ b/alignment.cpp
@@ -700,6 +700,12 @@ void Alignment::qc () const
   
   QC_ASSERT (nident <= (refEnd    - refStart) / al2ref_len);
   QC_ASSERT (nident <= (targetEnd - targetStart) / al2target_len);
+  
+  for (const SeqChange& seqChange : seqChanges)
+  {
+    seqChange. qc ();
+    QC_ASSERT (seqChange. al == this);
+  }
 }
 
 
diff --git a/amr_report.cpp b/amr_report.cpp
index fadc32f..ca4a32c 100644
--- a/amr_report.cpp
+++ b/amr_report.cpp
@@ -1180,8 +1180,7 @@ struct Batch
       for (const SeqChange& seqChange1 : blastAl1->seqChanges)
       {
         ASSERT (seqChange1. al == blastAl1);
-        if (! seqChange1. mutation)
-          continue;
+        ASSERT (seqChange1. mutation);
         for (const BlastAlignment* blastAl2 : goodBlastAls)
           if (   blastAl2->targetName   == blastAl1->targetName
               && blastAl2->targetStrand == blastAl1->targetStrand
@@ -1190,6 +1189,7 @@ struct Batch
             for (Iter<Vector<SeqChange>> iter (var_cast (blastAl2) -> seqChanges); iter. next (); )
             {
               SeqChange& seqChange2 = *iter;
+              ASSERT (seqChange2. mutation);
               ASSERT (seqChange2. al == blastAl2);
               if (   seqChange1. start_target == seqChange2. start_target 
                   && seqChange1. better (seqChange2)
diff --git a/amrfinder.cpp b/amrfinder.cpp
index f7933bb..c6f939c 100644
--- a/amrfinder.cpp
+++ b/amrfinder.cpp
@@ -33,6 +33,8 @@
 *               cat, cp, cut, grep, head, mkdir, mv, nproc, sed, sort, tail
 *
 * Release changes:
+*   3.6.3  01/03/2020 PD-3230   sorting of report rows
+*          12/28/2019           QC in dna_mutation
 *   3.6.2  12/27/2019 PD-3230   Redundant reported lines are removed for mutated reference proteins
 *                               Reports are sorted by sort
 *   3.6.1  12/27/2019 PD-3230   Mutated proteins are added to AMRProt
@@ -90,7 +92,7 @@ using namespace Common_sp;
 #ifdef SVN_REV
   #define SOFTWARE_VER SVN_REV
 #else
-  #define SOFTWARE_VER "3.6.2"
+  #define SOFTWARE_VER "3.6.3"
 #endif
 #define DATA_VER_MIN "2019-12-26.1"  
 
@@ -655,8 +657,8 @@ struct ThisApplication : ShellApplication
 	  }
 
     // Sorting
-    // PD-2244
-    const string sortS (emptyArg (dna) && emptyArg (gff) ? "-k2 -k1" : "-k2 -k3n -k4n -k5 -k1");
+    // PD-2244, PD-3230
+    const string sortS (emptyArg (dna) && emptyArg (gff) ? "-k1,1 -k2,2" : "-k1,1 -k2,2 -k3,3n -k4,4n -k5,5");
 		exec ("head -1 "              + tmp + ".amr                      >  " + tmp + ".amr-out");
 		exec ("LANG=C && tail -n +2 " + tmp + ".amr | sort " + sortS + " >> " + tmp + ".amr-out");
 		exec ("mv " + tmp + ".amr-out " + tmp + ".amr");
diff --git a/amrfinder_update.cpp b/amrfinder_update.cpp
index 584a160..51e2536 100644
--- a/amrfinder_update.cpp
+++ b/amrfinder_update.cpp
@@ -56,7 +56,7 @@ using namespace Common_sp;
 #ifdef SVN_REV
   #define SOFTWARE_VER SVN_REV
 #else
-  #define SOFTWARE_VER "3.6.2"
+  #define SOFTWARE_VER "3.6.3"
 #endif
 
 string curMinor;
diff --git a/dna_mutation.cpp b/dna_mutation.cpp
index 8a25a12..40cee86 100644
--- a/dna_mutation.cpp
+++ b/dna_mutation.cpp
@@ -51,7 +51,7 @@ using namespace Alignment_sp;
 #ifdef SVN_REV
   #define SOFTWARE_VER SVN_REV
 #else
-  #define SOFTWARE_VER "3.6.2"
+  #define SOFTWARE_VER "3.6.3"
 #endif
 
 
@@ -65,7 +65,6 @@ unique_ptr<OFStream> mutation_all;  // ??
 
 
 struct BlastnAlignment : Alignment
-// BLASTN alignment
 {
 	// PD-2001
  	static constexpr const size_t flankingLen = 200;  // PAR  
@@ -149,7 +148,7 @@ struct BlastnAlignment : Alignment
 
 struct Batch
 {
-  vector<BlastnAlignment> blastAls;   
+  VectorOwn<BlastnAlignment> blastAls;   
   
   
   explicit Batch (const string &mutation_tab)
@@ -214,10 +213,11 @@ struct Batch
 	    os << td. str () << endl;
 	  }
 
-  	for (const auto& blastAl : blastAls)
+  	for (const BlastnAlignment* blastAl : blastAls)
   	{
-   	  blastAl. qc ();
-   	  blastAl. saveText (os);
+  	  ASSERT (blastAl);
+   	  blastAl->qc ();
+   	  blastAl->saveText (os);
     }
 	}
 };
@@ -259,10 +259,12 @@ struct ThisApplication : Application
   	      if (verbose ())
   	        cout << f. line << endl;  
   	    }
-  	    BlastnAlignment al (f. line);
-  	    al. qc ();  
-  	    if (al. good ())
-  	      batch. blastAls. push_back (move (al));
+  	    auto al = new BlastnAlignment (f. line);
+  	    al->qc ();  
+  	    if (al->good ())
+  	      batch. blastAls << al;
+  	    else
+  	      delete al;
   	  }
   	}
   	if (verbose ())
@@ -275,32 +277,35 @@ struct ThisApplication : Application
     if (verbose ())
     {
 	    cout << "After process():" << endl;
-		  for (const auto& blastAl : batch. blastAls)
+		  for (const BlastnAlignment* blastAl : batch. blastAls)
 		  {
-		    blastAl. saveText (cout);
-		    cout << ' ' << blastAl. seqChanges. size () << endl;
+		    ASSERT (blastAl);
+		    blastAl->saveText (cout);
+		    cout << ' ' << blastAl->seqChanges. size () << endl;
 		  }
 		}
 		
     
-    for (const BlastnAlignment& blastAl1 : batch. blastAls)
-      for (const SeqChange& seqChange1 : blastAl1. seqChanges)
+    for (const BlastnAlignment* blastAl1 : batch. blastAls)
+      for (const SeqChange& seqChange1 : blastAl1->seqChanges)
       {
-        if (! seqChange1. mutation)
-          continue;
-        for (BlastnAlignment& blastAl2 : batch. blastAls)
-          if (   blastAl2. targetName   == blastAl1. targetName
-              && blastAl2. targetStrand == blastAl1. targetStrand
-              && & blastAl2 != & blastAl1
+        ASSERT (seqChange1. al == blastAl1);
+        ASSERT (seqChange1. mutation);
+        for (const BlastnAlignment* blastAl2 : batch. blastAls)
+          if (   blastAl2->targetName   == blastAl1->targetName
+              && blastAl2->targetStrand == blastAl1->targetStrand
+              && blastAl2 != blastAl1
              )  
-            for (SeqChange& seqChange2 : blastAl2. seqChanges)
+          //for (SeqChange& seqChange2 : blastAl2. seqChanges)
+            for (Iter<Vector<SeqChange>> iter (var_cast (blastAl2) -> seqChanges); iter. next (); )
             {
-              if (! seqChange2. mutation)
-                continue;
+              SeqChange& seqChange2 = *iter;
+              ASSERT (seqChange2. al == blastAl2);
+              ASSERT (seqChange2. mutation);
               if (   seqChange1. start_target         == seqChange2. start_target 
                   && seqChange1. neighborhoodMismatch <  seqChange2. neighborhoodMismatch
                  )
-                seqChange2 = SeqChange ();
+                iter. erase ();
             }
       }
 		
diff --git a/version.txt b/version.txt
index b727628..4a788a0 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.6.2
+3.6.3