Hello Michael. I have noticed that my css files contain all code twice

Handler: 
getApplicationFrameR :: Handler RepHtml
getApplicationFrameR = do
    defaultLayout $ do
       setTitle "Помогай"
       addJulius $(juliusFile "application")
       addScript JsApiR
       addCassius $(cassiusFile "application-frame")
       addWidget $(widgetFile "application-frame")

Cassius: (application-frame.cassius):
div#header
    color: red
div#content
    color: green


css output from browser:
div#header{color:red}div#content{color:green}div#header{color:red}div#content{color:green}body{font-family:sans-serif}


The Lucius behavior is the same.
What do i make wrong ? 

Thanks.

--
Best regards,
Cheshkov Anton
Phone: +7 909 005 18 82
Skype: cheshkov_anton