Please confirm, by testing saving Second in Customizer!

When using a customizer.json with basic settings, meaning body background-color and color, those values are saved twice in customizer.css

T.ex. this basic customizer.json:

{

    "general": {

        "title": "text_general_title",

        "description": "text_general_description",

        "control": {

            "sitename": {

                "selector": "#logo a"

            }

        }

    },

    "colors": {

        "title": "text_colors_title",

        "description": "text_colors_description",

        "control": {

            "container_background-color": {

                    "type": "color",

                    "label": "text_colors_container_background_label",

                    "default": "#bdc3c7",

                    "selector": "body"

            },

            "container-color_color": {

                    "type": "color",

                    "label": "text_colors_container_color_label",

                    "default": "#666666",

                    "selector": "body"

            }

        }

    },

    "images": {

        "title": "text_images_title",

        "description": "text_images_description",

        "control": {

            "logo": {

                "selector": "#logo a img"

            }

        }

    }

}

When saving in Customizer, it will generate this customizer.css:

 body { 

 	font-family : inherit; 

 } 



 body { 

 	width : 100%; 

 } 



 body { 

 	background-color : #bdc3c7; 

 } 



 body { 

 	background-color : #bdc3c7; 

 } 



 body { 

 	color : #666666; 

 } 



 body { 

 	color : #666666; 

 }