SA is typically later in the process. If you have a number starting with F that typically means you should have already received your AOR, or they are behind on sending them out and you should get it soon. Check your application status using that number in ECAS to see what point you're actually at in the process. If you didnt include an email address or if it wasn't legible (like if you filled out forms by hand maybe it wasnt totally readable), your AOR could be coming in the mail and taking extra long.