diff --git a/gen/main.py b/gen/main.py
index 6729740..17b241c 100755
--- a/gen/main.py
+++ b/gen/main.py
@@ -49,16 +49,11 @@ if __name__ == "__main__" :
 	variables = utils.load_variables(args.variables)
 	configurator.load_variables(variables)
 	config = configurator.get_config()
-	#print(config)
 
-	# Remove old config
-	# TODO : remove unnecessary files after rendering
-#	for filename in os.listdir(args.output):
-#		file_path = os.path.join(args.output, filename)
-#		if os.path.isfile(file_path) or os.path.islink(file_path):
-#			os.unlink(file_path)
-#		elif os.path.isdir(file_path):
-#			shutil.rmtree(file_path)
+	# TODO : find a proper way to remove old sites
+	env_list = glob.glob(args.output + "/**/*.env", recursive=True)
+	for env in env_list :
+		os.remove(env)
 
 	# Generate the files from templates and config
 	templator = Templator(config, args.templates, args.output, args.target)
diff --git a/settings.json b/settings.json
index 1d91e45..770baf8 100644
--- a/settings.json
+++ b/settings.json
@@ -534,7 +534,7 @@
                 "env": "EMAIL_LETS_ENCRYPT",
                 "id": "email-lets-encrypt",
                 "label": "Email lets encrypt",
-                "regex": "^([a-z0-9\-\.]+@[a-z\-0-9\.]+|.{0})$",
+                "regex": "^([a-z0-9\\-\\.]+@[a-z\\-0-9\\.]+|.{0})$",
                 "type": "text"
             },
             {
@@ -633,7 +633,7 @@
                 "env": "SELF_SIGNED_SSL_STATE",
                 "id": "self-signed-ssl-state",
                 "label": "State of the self-signed certificate",
-                "regex": "^[A-Za-z\\-]+$",
+                "regex": "^[A-Za-z\\- ]+$",
                 "type": "text"
             },
             {
@@ -642,7 +642,7 @@
                 "env": "SELF_SIGNED_SSL_CITY",
                 "id": "self-signed-ssl-city",
                 "label": "City of the self-signed certificate",
-                "regex": "^[A-Za-z\\-]+$",
+                "regex": "^[A-Za-z\\- ]+$",
                 "type": "text"
             },
             {
@@ -651,7 +651,7 @@
                 "env": "SELF_SIGNED_SSL_OU",
                 "id": "self-signed-ssl-ou",
                 "label": "Organizational Unit of the self-signed certificate",
-                "regex": "^[A-Za-z\\-]+$$",
+                "regex": "^[A-Za-z\\-]+$",
                 "type": "text"
             },
             {
@@ -660,7 +660,7 @@
                 "env": "SELF_SIGNED_SSL_ORG",
                 "id": "self-signed-ssl-org",
                 "label": "Organization name of the self-signed certificate",
-                "regex": "^[A-Za-z\\- ]+$$",
+                "regex": "^[A-Za-z\\- ]+$",
                 "type": "text"
             },
             {
@@ -974,7 +974,7 @@
                 "env": "REMOTE_PHP",
                 "id": "remote-php",
                 "label": "Remote php",
-                "regex": "^[a-z\-0-9_\.]*$",
+                "regex": "^[a-z\\-0-9_\\.]*$",
                 "type": "text"
             },
             {
@@ -983,7 +983,7 @@
                 "env": "REMOTE_PHP_PATH",
                 "id": "remote-php-path",
                 "label": "Remote php path",
-                "regex": "^\/[a-zA-Z\-0-9_\.\/]*$",
+                "regex": "^\\/[a-zA-Z\\-0-9_\\.\\/]*$",
                 "type": "text"
             },
             {
@@ -992,7 +992,7 @@
                 "env": "LOCAL_PHP",
                 "id": "local-php",
                 "label": "local php",
-                "regex": "^\/[a-zA-Z\-0-9_\.\/]*$",
+                "regex": "^\\/[a-zA-Z\\-0-9_\\.\\/]*$",
                 "type": "text"
             },
             {
@@ -1001,7 +1001,7 @@
                 "env": "LOCAL_PHP_PATH",
                 "id": "local-php-path",
                 "label": "Local php path",
-                "regex": "^\/[a-zA-Z\-0-9_\.\/]*$",
+                "regex": "^\\/[a-zA-Z\\-0-9_\\.\\/]*$",
                 "type": "text"
             }
         ]
diff --git a/ui/src/Config.py b/ui/src/Config.py
index 9f24cef..c065f09 100644
--- a/ui/src/Config.py
+++ b/ui/src/Config.py
@@ -58,7 +58,9 @@ class Config :
         for filename in glob.iglob("/etc/nginx/**/site.env") :
             env = self.__env_to_dict(filename)
             services.append(env)
-        services.append(self.__env_to_dict("/etc/nginx/site.env"))
+	no_multisite = self.__env_to_dict("/etc/nginx/site.env")
+	if len(no_multisite) > 0 :
+		services.append(no_multisite)
         return services
 
     def check_variables(self, variables) :
diff --git a/ui/templates/services-new.html b/ui/templates/services-new.html
index 3281462..7904d01 100644
--- a/ui/templates/services-new.html
+++ b/ui/templates/services-new.html
@@ -26,7 +26,7 @@
 		{% if param["type"] != "multiple" and param["context"] == "multisite" %}
 							<div class="row mb-3" id="form-new-{{ param["id"] }}">
 			{% set default = {"value": param["default"]} %}
-			{% if param["env"] in config["CONFIG"].get_config() %}
+			{% if param["env"] in config["CONFIG"].get_config() and param["env"] != "SERVER_NAME" %}
 				{% set x = default.update({"value": config["CONFIG"].get_config()[param["env"]]}) %}
 			{% endif %}
 								{{ form_service_gen("form-new-" + param["id"], param["label"], param["type"], default["value"], param["env"])|safe }}
@@ -58,4 +58,4 @@
 			</div>
 		</div>
 	</div>
-</div>
\ No newline at end of file
+</div>