The person with the best connection sould do the drafting.. people on dial-up should not even think of drafting.
Also, last person in hex should do the drafting (should also have the best connection if at all possible, or best connection for their side).
Finally those who are being drafted, you need to click MAP then click Missions, then select the mission. This will help ensure that you choose th correct mission in which you were drafted.
Also, if you are using an Active Anti-Virus, SHUT IT OFF TO PLAY A GAME ONLINE.. not just SFC, but any game. This prevents packet loss when playing and keeps games real time when playing... Anti-Virus may block and slow down game information packets which in return will cause lag and drops in game.
Finally, make sure that your 3rd party Firewall is configured correctly or shut off and that Windows Firewall is disabled in Services.msc and also Universal Plug and Play is disabled in services.msc.
P.S. also keep your Video and sound card drivers up to date from the manufaturer of your video card or sound card.. if you have an MSI made Radeon card, you would go to ATI as radeon is an ATI chipset, as such ATI has your drivers.. same goes for GeForce.. go to NVidia and get the latest drivers.
Plus make sure that your system is up to date and has a fully installed and valid version of DirectX 9.0c.