Therefore I will correct the scores and add my votes to my newest post here now:- You cannot subtract points from the same two nominees as in your last post, or in the most thread's recent post. You can subtract points from one of those nominees, but the other has to be different.
Edit: As the list is now down to 3 players as of the below post, there are no restrictions on who you can add or subtract points from, apart from adding points to yourself, and the 2 subtract 1 add rule, of course