How can I transfer photos from the Camera Roll to Photo Stream? Not all of my photos go to Photo Stream, some still go to my Camera Roll.  I'm trying to get them on my Photo Stream so they will be on iCloud.
With 30 photos on my camera, 10 in stream, I took 6 photos.  2 appeared in stream, 4 did not.  Some of my subsequent photos also appeared in the stream, but not all.  This is arbitrary behavior by the program.  How to fix?  Assume ios 7.0.
Any photos that exist in the Camera Roll that didn't come from the device itself had to come from another device. The primary method for getting these pictures into iCloud's 1000 picture buffer is to enroll that other device into iCloud.

You have one case of a picture that was taken either more than 30 days ago or 1000 pictures ago or you deleted your entire Photo Stream and want to start over. In this case, you may need to sync those photos to a computer or another device using the Camera Connecton Kit to inject them into your current Photo Stream.