anchor.diff:  			loop(NewState);
   		_Msg = #node_ack_announce{sender=_Sender, pid=Pid, node=Node, state=TheirState} ->
   			debug:log("node: received ack_announce for ~p on ~p~n~p", [Pid, Node, TheirState]),
  -			start_monitoring_node(Node),
  -			NewState = set_node_status(Node, up, State),
  -			loop(NewState);
  +			case node_monitored(Node, State) of
  +				true ->	ok;
  +				false ->
  +					start_monitoring_node(Node),
  +					NewState = set_node_status(Node, up, State),
  +					loop(NewState)
  +			end;
   		_Msg = #node_announce{sender=_Sender, pid=Pid, node=Node, state=TheirState} ->
  -			debug:log("received announce for ~p on ~p~n~p", [Pid, Node, TheirState]),
  -			start_monitoring_node(Node),
  -			NewState = set_node_status(Node, up, State),
  -			Pid ! #node_announce{sender=self(), pid=self(), node=node(), state=State},
  -			loop(NewState);
  +			debug:log("node: received announce for ~p on ~p~n~p", [Pid, Node, TheirState]),
  +			case node_monitored(Node, State) of
  +				true -> ok;
  +				false ->
  +					start_monitoring_node(Node),
  +					NewState = set_node_status(Node, up, State),
  +					Pid ! #node_ack_announce{sender=self(), pid=self(), node=node(), state=State},
  +					loop(NewState)
  +			end;
   		M ->
   			debug:log("node:UNKNOWN: ~p", [M]),
   			loop(State)
  
positive.code: 			announce(T, State);
  		true ->
  			debug:log("node: not announcing to self"),
  			state_change_em:notify(#state_change{sender=self(), node=node(), objtype=?MODULE, obj=node(), prev_state=down, new_state=up, ts=timestamp:now_i()})
  	end;
  announce([], _State) ->
  	[].
  
negative.code: %remove_node_from_state(Node, []) ->
  %	[].
  
  node_monitored(Node, [{Node, _}|_T]) ->
  	debug:log("node: node (~p) already monitored!", [Node]),
  	true;
  node_monitored(Node, [_H|T]) ->
  	node_monitored(Node, T);
  node_monitored(Node, []) ->
  	debug:log("node: node (~p) not monitored yet", [Node]),
  	false.
  
  set_node_status(Node, Status, [{Node, _}|T]) ->
  	[{Node, Status}|T];
  set_node_status(Node, Status, [H|T]) ->
  