Help! Decal Question/Problem

Hi,
I am new to trying to use the Decal function. I apply the decal toa normal surface and there, from the front side, it looks good butthe decal bleeds to all the other surfaces behind it.. If I look atthe decal from the backside I see a reverse image of it, projectedon the face behind it.. How do I turn that off??

-TimSolidworksPhotoworks