Currently Being ModeratedApr 24, 2013 4:21 PM (in response to patrickredsox)
Do you have your iPhoto Photo Stream preferences set to include all imports to the library, i.e. the Automatic Upload checkbox checked? If so then any image imorted into your library will be included in the PS.
To remove photos from the PS in iPhoto go to the PS section, Control-click on the photos to be deleted and select Delete from Photo Stream.