The reason why this is happening is because the game you have uploaded is not yet on Twitch's database. Keymailer is trying to encourage developers to make sure they add the game on Giantbomb's Wiki before the games release to avoid this issue. They're also talking with Twitch to see if there is a way we can help communicate this.
While this is being resolved, here's a couple of tips to help solve this problem.
1) Ask for the game to be added to Giantbomb's wiki, and as soon as it is, the content will appear automatically on your Keymailer profile
2) Upload the VOD content on to YouTube with the games YouTube tag (found on Keymailer site), and it will appear in your stream