I have had an issue where sometimes a picture I take with my iPhone does not get uploaded to my photo stream. For example, I was in the park and took about 6 pictures. 1 of them never made it to Photostream even though it is still on my phone. Yesterday, I snapped another picture somewhere and it is still not on my photo stream (even though it remains on the phone). My question is, is there something that causes this bug? The only thing I can think of is possible double hitting the home button and taking the photo when it was locked. Though I am not sure if that is what I did for the photo a while ago, but it is on the one I took yesterday. Also, is there any way to force a photo from the camera roll to Photostream so I can get the missing two photos in there?