You also have to go to the Gamedev.tv game jam page and click "submit your project" and follow additional instructions.
If unsure it went through: at the top right, your user name has a downward-pointing arrow next to it. Click that, then select (under Explore) Game James. At the top of the page that loads, find the button that is labeled "Jam Dashboard" near the top right and click that. You can then see all your submissions to all game jams and determine if it was submitted ok or not.
