diff --git a/Elwig/Windows/DeliveryAdminWindow.xaml.cs b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
index bcd8537..a6be751 100644
--- a/Elwig/Windows/DeliveryAdminWindow.xaml.cs
+++ b/Elwig/Windows/DeliveryAdminWindow.xaml.cs
@@ -181,7 +181,8 @@ namespace Elwig.Windows {
 
         private void GradationKmwInput_LostFocus(object sender, RoutedEventArgs evt) {
             InputLostFocus((TextBox)sender, Validator.CheckGradationKmw);
-            if (!GradationKmwInput.Text.Contains(',')) GradationKmwInput.Text += ",0";
+            if (GradationKmwInput.Text.Length != 0 && !GradationKmwInput.Text.Contains(','))
+                GradationKmwInput.Text += ",0";
         }
 
         private void AttributesInput_SelectionChanged(object sender, ItemSelectionChangedEventArgs evt) {
diff --git a/Elwig/Windows/DeliveryReceptionWindow.xaml b/Elwig/Windows/DeliveryReceptionWindow.xaml
deleted file mode 100644
index 5047be0..0000000
--- a/Elwig/Windows/DeliveryReceptionWindow.xaml
+++ /dev/null
@@ -1,12 +0,0 @@
-<Window x:Class="Elwig.Windows.DeliveryReceptionWindow"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:local="clr-namespace:Elwig.Windows"
-        mc:Ignorable="d"
-        Title="Übernahme" Height="450" Width="800">
-    <Grid>
-        
-    </Grid>
-</Window>
diff --git a/Elwig/Windows/DeliveryReceptionWindow.xaml.cs b/Elwig/Windows/DeliveryReceptionWindow.xaml.cs
deleted file mode 100644
index f88b4cf..0000000
--- a/Elwig/Windows/DeliveryReceptionWindow.xaml.cs
+++ /dev/null
@@ -1,9 +0,0 @@
-using System.Windows;
-
-namespace Elwig.Windows {
-    public partial class DeliveryReceptionWindow : Window {
-        public DeliveryReceptionWindow() {
-            InitializeComponent();
-        }
-    }
-}