I need to edit that post because I didn't even put all the seats As I came back and seen it. Anyways these multiple seats are due to the fact that the empires of these nations inhabit more than one region. This was really set in place as a way to gain political power, and how nations handle it, but you have a seat wendy, bring it up for a proposal.
Here is how you set up a proposal. You go to the federation page on the site. Then you find your seat, press the Joint Chief of Staff Proposal button, and post the proposal. Set it up as COJCSR00001 The XYZ Act, and put the body of the propsal, and submit it. It will then be picked up by the Majority leader, and brought to the floor for debate, and passage. The Secretary of State approves it into law, and the Secretary General puts the final approval, and it is law.