I've deleted all my captures, so I will see if that fixes the issue.
I definitely think there's some bugs with the system though. For one, I wish it was more streamlined: there should be a share button configuration that allows you to capture a screenshot and the last 15 minutes of gameplay without bringing up the share menu; it is so, tedious to bring up the share menu in a multiplayer match just to capture an awesome moment that just happened.
Also, bringing up the share menu in the XMB (or whatever its called now) to edit videos and upload them, creates an unnecessary screenshot of my XMB. Before I deleted all my captures, I had so many screenshots of my XMB from when I tried to upload my videos.
I really like this feature, but it needs improvement.
When i hit the share button it only saves previously played matches, never the one i'm in. games from hours prior to hitting the share button. please fix? throwing knives embarrassing players everywhere that i can't allow the world to see. Black Ops 2 had a better rendering system