diff --git a/src/Mathielen/DataImport/ItemConverter/FieldLowercaseConverter.php b/src/Mathielen/DataImport/ItemConverter/FieldLowercaseConverter.php
new file mode 100644
index 0000000..34fd29c
--- /dev/null
+++ b/src/Mathielen/DataImport/ItemConverter/FieldLowercaseConverter.php
@@ -0,0 +1,14 @@
+<?php
+namespace Mathielen\DataImport\ItemConverter;
+
+use Ddeboer\DataImport\ItemConverter\ItemConverterInterface;
+
+class FieldLowercaseConverter implements ItemConverterInterface
+{
+
+    public function convert($input)
+    {
+        return array_change_key_case($input, CASE_LOWER);
+    }
+
+}
diff --git a/src/Mathielen/ImportEngine/Mapping/Mappings.php b/src/Mathielen/ImportEngine/Mapping/Mappings.php
index bad60fc..5a9310e 100644
--- a/src/Mathielen/ImportEngine/Mapping/Mappings.php
+++ b/src/Mathielen/ImportEngine/Mapping/Mappings.php
@@ -96,7 +96,7 @@ public function apply(Workflow $workflow, ConverterProviderInterface $converterP
                 }
 
                 if ($converter instanceof ValueConverterInterface) {
-                    $workflow->addValueConverter($from, $converter);
+                    $workflow->addValueConverter($to, $converter);
                 } elseif ($converter instanceof ItemConverterInterface) {
                     $workflow->addItemConverter($converter);
                 }
diff --git a/src/Mathielen/ImportEngine/Storage/LocalFileStorage.php b/src/Mathielen/ImportEngine/Storage/LocalFileStorage.php
index f6a184e..dc1a960 100644
--- a/src/Mathielen/ImportEngine/Storage/LocalFileStorage.php
+++ b/src/Mathielen/ImportEngine/Storage/LocalFileStorage.php
@@ -88,7 +88,7 @@ private function formatToReader(Format $format, \SplFileInfo $file)
             $reader = new CsvReader($file->openFile(), $format->getDelimiter(), $format->getEnclosure(), $format->getEscape());
             $reader->setStrict(false);
             if ($format->isHeaderInFirstRow()) {
-                $reader->setHeaderRowNumber(0);
+                $reader->setHeaderRowNumber(0, CsvReader::DUPLICATE_HEADERS_MERGE);
                 $reader->setColumnHeaders(array_map('trim', $reader->getColumnHeaders())); //TODO some header-collaborator?
             }
 
diff --git a/tests/integration/Mathielen/ImportEngine/Import/Run/ImportRunnerTest.php b/tests/integration/Mathielen/ImportEngine/Import/Run/ImportRunnerTest.php
index 17015ef..70a6b95 100644
--- a/tests/integration/Mathielen/ImportEngine/Import/Run/ImportRunnerTest.php
+++ b/tests/integration/Mathielen/ImportEngine/Import/Run/ImportRunnerTest.php
@@ -59,14 +59,14 @@ public function test()
         $import = $importBuilder->build($importRequest);
 
         $import->mappings()
-            ->add('Anrede', 'salutation', 'upperCase')
-            ->add('Name', 'name', 'lowerCase');
+            ->add('prefix', 'Anrede', 'upperCase')
+            ->add('name', 'Name', 'lowerCase');
 
         $importRunner = new ImportRunner(new DefaultWorkflowFactory($eventDispatcher));
 
         $expectedResult = array(
-            'name' => 'Jennie Abernathy',
-            'prefix' => 'Ms.',
+            'Name' => 'jennie abernathy',
+            'Anrede' => 'MS.',
             'street' => '866 Hyatt Isle Apt. 888',
             'zip' => '65982',
             'city' => 'East Laurie',