diff --git a/java/src/org/broadinstitute/sting/gatk/report/GATKReport.java b/java/src/org/broadinstitute/sting/gatk/report/GATKReport.java
index 92252c39e..d9e6782e5 100755
--- a/java/src/org/broadinstitute/sting/gatk/report/GATKReport.java
+++ b/java/src/org/broadinstitute/sting/gatk/report/GATKReport.java
@@ -24,11 +24,21 @@ public class GATKReport {
         tables.put(tableName, table);
     }
 
+    /**
+     * Return true if table with a given name exists
+     *
+     * @param tableName  the name of the table
+     * @return true if the table exists, false otherwise
+     */
+    public boolean hasTable(String tableName) {
+        return tables.containsKey(tableName);
+    }
+
     /**
      * Return a table with a given name
      *
      * @param tableName  the name of the table
-     * @return  the name of the table
+     * @return  the table object
      */
     public GATKReportTable getTable(String tableName) {
         return tables.get(tableName);
diff --git a/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/NewVariantEvalWalker.java b/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/NewVariantEvalWalker.java
index eba88c972..c062dbe22 100755
--- a/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/NewVariantEvalWalker.java
+++ b/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/NewVariantEvalWalker.java
@@ -747,21 +747,26 @@ public class NewVariantEvalWalker extends RodWalker<Integer, Integer> implements
                             String subTableName = ve.getClass().getSimpleName() + "." + field.getName();
                             String subTableDesc = datamap.get(field).description();
 
-                            report.addTable(subTableName, subTableDesc);
-                            GATKReportTable table = report.getTable(subTableName);
+                            GATKReportTable table;
+                            if (!report.hasTable(subTableName)) {
+                                report.addTable(subTableName, subTableDesc);
+                                table = report.getTable(subTableName);
 
-                            table.addPrimaryKey("entry", false);
-                            table.addColumn(subTableName, subTableName);
+                                table.addPrimaryKey("entry", false);
+                                table.addColumn(subTableName, subTableName);
 
-                            for ( VariantStratifier vs : stratificationObjects ) {
-                                String columnName = vs.getClass().getSimpleName();
+                                for ( VariantStratifier vs : stratificationObjects ) {
+                                    String columnName = vs.getClass().getSimpleName();
 
-                                table.addColumn(columnName, "unknown");
-                            }
+                                    table.addColumn(columnName, "unknown");
+                                }
 
-                            for ( Object o : t.getColumnKeys() ) {
-                                String c = (String) o;
-                                table.addColumn(c, 0.0);
+                                for ( Object o : t.getColumnKeys() ) {
+                                    String c = (String) o;
+                                    table.addColumn(c, 0.0);
+                                }
+                            } else {
+                                table = report.getTable(subTableName);
                             }
 
                             for (int row = 0; row < t.getRowKeys().length; row++) {
diff --git a/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/evaluators/GenotypeConcordance.java b/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/evaluators/GenotypeConcordance.java
index 558a7d1d3..da54034ab 100755
--- a/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/evaluators/GenotypeConcordance.java
+++ b/java/src/org/broadinstitute/sting/playground/gatk/walkers/newvarianteval/evaluators/GenotypeConcordance.java
@@ -258,11 +258,18 @@ public class GenotypeConcordance extends VariantEvaluator {
             qualityScoreHistograms = new QualityScoreHistograms();
         }
 
-        if ( alleleCountStats == null && eval != null && validation != null ) {
+        if ( alleleCountStats == null && eval != null && validation != null && validation.getSampleNames().size() > 0) {
             alleleCountStats = new ACStats(eval,validation,Genotype.Type.values().length);
             alleleCountSummary = new ACSummaryStats(eval, validation);
         }
 
+        if ( alleleCountStats != null ) {
+//            for ( int i = 0; i <= 2*validation.getGenotypes().size(); i++ ) {
+//                concordanceStats.put(String.format("compAC%d",i), new long[nGenotypeTypes][nGenotypeTypes]);
+//                rowKeys[1+2*evalvc.getGenotypes().size()+i] = String.format("compAC%d",i);
+//            }
+        }
+
         if (sampleStats == null) {
             if (eval != null) {
                 // initialize the concordance table
@@ -321,10 +328,7 @@ public class GenotypeConcordance extends VariantEvaluator {
                 sampleStats.incrValue(sample, truth, called);
                 if ( evalAC != null && validationAC != null) {
                     alleleCountStats.incrValue(evalAC,truth,called);
-
-                    //System.err.println(evalAC + " " + validationAC);
-
-                    //alleleCountStats.incrValue(validationAC,truth,called);
+                    alleleCountStats.incrValue(validationAC,truth,called);
                 }
             }
         }