diff --git a/domain_alias/domain_alias.features.inc b/domain_alias/domain_alias.features.inc
index 256070a..9610998 100644
--- a/domain_alias/domain_alias.features.inc
+++ b/domain_alias/domain_alias.features.inc
@@ -95,14 +95,17 @@ function domain_alias_features_rebuild($module) {
       if (!$domain_id) {
         continue;
       }
+      // Delete existing alias records.
+      db_delete('domain_alias')
+        ->condition('domain_id', $domain_id)
+        ->execute();
       // Save the new alias records.
-      if (empty($list)) {
-        // @todo: delete the records.
-      }
-      foreach ($list as $alias) {
-        $alias['domain_id'] = $domain_id;
-        $alias['pattern'] = _domain_alias_placeholders_to_sql($alias['pattern']);
-        drupal_write_record('domain_alias', $alias);
+      if (!empty($list)) {
+        foreach ($list as $alias) {
+          $alias['domain_id'] = $domain_id;
+          $alias['pattern'] = _domain_alias_placeholders_to_sql($alias['pattern']);
+          drupal_write_record('domain_alias', $alias);
+        }
       }
     }
   }
diff --git a/domain_conf/domain_conf.features.inc b/domain_conf/domain_conf.features.inc
index ff36b29..8c6d2ae 100644
--- a/domain_conf/domain_conf.features.inc
+++ b/domain_conf/domain_conf.features.inc
@@ -89,15 +89,18 @@ function domain_conf_features_rebuild($module) {
       if (!$domain_id) {
         continue;
       }
+      // Delete existing conf records.
+      db_delete('domain_conf')
+        ->condition('domain_id', $domain_id)
+        ->execute();
       // Save the new records.
-      if (empty($variables)) {
-        // @todo: delete the record.
+      if (!empty($variables)) {
+        $record = array(
+          'domain_id' => $domain_id,
+          'settings' => serialize($variables),
+        );
+        drupal_write_record('domain_conf', $record);
       }
-      $record = array(
-        'domain_id' => $domain_id,
-        'settings' => serialize($variables),
-      );
-      drupal_write_record('domain_conf', $record);
     }
   }
 }
diff --git a/domain_theme/domain_theme.features.inc b/domain_theme/domain_theme.features.inc
index 33ae0a1..11653f7 100644
--- a/domain_theme/domain_theme.features.inc
+++ b/domain_theme/domain_theme.features.inc
@@ -95,18 +95,22 @@ function domain_theme_features_rebuild($module) {
       if (!$domain_id) {
         continue;
       }
-      if (empty($themes)) {
-        // @todo: delete the record.
-      }
-      foreach ($themes as $theme) {
-        $record = array(
-          'domain_id' => $domain_id,
-          'theme' => $theme['theme'],
-          'settings' => serialize($theme['settings']),
-          'status' => $theme['status'],
-          'filepath' => $theme['filepath'],
-        );
-        drupal_write_record('domain_theme', $record);
+      // Delete existing theme settings.
+      db_delete('domain_theme')
+        ->condition('domain_id', $domain_id)
+        ->execute();
+      // Save the new theme settings.
+      if (!empty($themes)) {
+        foreach ($themes as $theme) {
+          $record = array(
+            'domain_id' => $domain_id,
+            'theme' => $theme['theme'],
+            'settings' => serialize($theme['settings']),
+            'status' => $theme['status'],
+            'filepath' => $theme['filepath'],
+          );
+          drupal_write_record('domain_theme', $record);
+        }
       }
     }
   }