Despite the fact that IRCC(cic) draws are more frequent nowadays than last year, I would still create a brand new EE profile because of the expiration date of your existing one is less and 1 month away. Let's suppose NS takes another week or two to nominate you, you'd have to ensure that you accept the nomination as soon as a possible, and that a draw comes in rapid succession thereafter, before the expiration date of your existing profile. If this doesn't happen within the three-to-two week window you'd have to contact NS again to transfer the nomination to the new profile --essentially doing what you could do now. Profile expiration shouldn't matter after you receive ITA but, but in your case you have a tight window for that to happen.
Re the NOC code request, yes that's normal. Just read carefully what they ask and provide it to them. I got a similar request.
Good luck in the process,and congrats! or should I say finally! they are working on your file.