Greetings from Afghanistan!
First off, not adding points for a year is not a basis to be removed from the Promotion Standling List (PSL). It is more likely that you did not have an updated APFT dated within 1 year.
The first thing you should find out from your retention NCO if you can be in a promotable status going in to the MOS that you are applying for. If you can and you get accepted, you will keep your promotable status even though you were boarded in a different MOS.