Adding /sites/5/ to media link url out of nowhere?

Hi Guys,

I have a multisite install, and on one of these sites I am trying to link to a media file using a cherry framework banner. Bizarrely it is suddenly not displaying images for new uploads, and after a quick check, the /uplaods/sites/5.. appears as /uplaods/sites/5/sites/5...
On the backend editor it doesn't appear like this, any idea why this is happening? Hope I;ve made myself clear..