diff --git a/system/engine/registry.php b/system/engine/registry.php
index 1fc8e11..091aeb3 100644
--- a/system/engine/registry.php
+++ b/system/engine/registry.php
@@ -210,10 +210,42 @@ final class Registry {
 		if(count($dataArray) > 1) {
 			foreach($dataArray as $key => $value) {
 				if($key !== "preferences")
-					self::$diOptions[$key] = isset(self::$diOptions[$key]) ? array_merge(self::$diOptions[$key], $value) : $value;
+					self::$diOptions[$key] = isset(self::$diOptions[$key]) ? self::array_merge_recursive_distinct(self::$diOptions[$key], $value) : $value;
 			}
 		}
 	}
+
+	private static function array_merge_recursive_distinct(array $array1, array $array2)
+	{
+		$merged = $array1;
+
+		foreach ($array2 as $key => &$value) {
+			if (is_array($value) && isset($merged[$key]) && is_array($merged[$key])) {
+				if (is_numeric(self::array_key_first($value))) {
+					// Concatenate arrays if both are numeric arrays (lists)
+					$merged[$key] = array_merge($merged[$key], $value);
+				} else {
+					// Recursively merge associative arrays
+					$merged[$key] = self::array_merge_recursive_distinct($merged[$key], $value);
+				}
+			} else {
+				$merged[$key] = $value;
+			}
+		}
+
+		return $merged;
+	}
+
+	private static function array_key_first($arr){
+		if (!function_exists('array_key_first')) {
+			foreach ($arr as $key => $unused) {
+				return $key;
+			}
+			return null;
+		} else {
+			return array_key_first($arr);
+		}
+	}
 	
 	/**
 	 * Adds DI preferences from a JSON file.
@@ -254,6 +286,7 @@ final class Registry {
 	 * @return bool 
 	 */
 	static public function isDIrouteChecked($route){
+		$route = strtolower($route);
 		return isset(self::$diCheckedRoutes[$route]);
 	}
 
@@ -263,6 +296,7 @@ final class Registry {
 	 * @return true 
 	 */
 	static public function addDIrouteChecked($route){
+		$route = strtolower($route);
 		self::$diCheckedRoutes[$route] = true;
 		return self::$diCheckedRoutes[$route];
 	}
@@ -357,7 +391,7 @@ final class Registry {
 	 * @throws \Exception 
 	 * @throws \Phacil\Framework\Exception 
 	 */
-	static public function returnArgumentType($type, $argumentValue) {
+	private static function returnArgumentType($type, $argumentValue) {
 		switch ($type) {
 			case 'object':
 				return self::getInstance($argumentValue);
@@ -367,9 +401,6 @@ final class Registry {
 				$object = array_map(function($value){
 					return self::getInstance($value);
 				}, $argumentValue);
-				/* foreach($argumentValue as $objectValue) {
-					$object[] = self::getInstance($objectValue);
-				} */
 				return $object;
 				break;