In my APAR for the year 2009 -10 the reporting officer gave a grading of 6.09 but was curtailed by Reviewing Officer intentionally to settle personal scores to 3. When I represented against this the competent authority in his assessment wrote I AGREE WITH THE GRADING GIVEN BY THE REPORTING OFFICER. REVIEWING OFFICER GRADING IS 'BIASED'. Subsequently the grading given by reporting officer is retained. But some adverse remarks are retained by competent authority.

What will be their effect on my future promotions?

How can I get these adverse remarks expunged?
Thanks