To get accurate help on your NCOER we need to know:
Wwhat the derogatory bullets are and in which blocks on the 2166 they are placed?
How are these bullets wrong and what evidence can you bring forward to refute these items?
What does your Sr. Rater say about the evaluation of the Rater (the 1SG is your rater I assume?) Do the Rater and Sr. Rater agree on your markings?
If they dont agree talk to your reviewer, this is their place to step in and fix the situation.
If the Rater and Sr Rater agree, you are pretty much SOL, and the paperwork will be processed :-/
Look into DA PAM 623-3 and the appeals process (the DA PAM details it better than the AR).
The bottom line is that unless the ASG members know the specifics, then we cannot help you.
Addtionally, if you cannotbring forth documented evidence that the bullets are incorrect or marks are placed too low, then you might be SOL. Rememeber the appeals are hardly ever won byt he ratee and the key to being successful is DOCUMENTATION and proving to a panel of uninformed third party individuals that this happened... trust me its harder than you will ever know.
Good luck and hope it works out!
P.S. You stated there are personal grudges between yourself and the 1SG but in the future learn to pick your battles, and how to get along with someone PROFESSIONALLY that you might not like PERSONALLY.
I will be the first to tell you that 90% of the people at my current assignement dislike me PERSONALLY (Im a hardass in an Air Froce world) BUT they all will chose me first on any assignement/task because they respect me PROFESSIONALLY.
Always remember wherever you go from here, keeping yout boss/rater happy is one of the most importatnt things you can do. Im not telling you to kiss ass or suck up, im jsut saying know your raters quirks and make sure you dont piss him/her off. Being on your raters good side while not being a suck-ass will go long ways in the future.