2 nodes in the cluster while it should be 1

Forgot to show logs:

[2015-07-12 17:39:42,422][INFO ][node                     ] [es_node_1] starting ...
[2015-07-12 17:39:42,630][INFO ][transport                ] [es_node_1] bound_address {inet[/0:0:0:0:0:0:0:0:9300]}, publish_address {inet[/X.X.X.146:9300]}
[2015-07-12 17:39:42,648][INFO ][discovery                ] [es_node_1] es-my-cluster/Ohqfp4iaQnSTAWxJD6Pg8g
[2015-07-12 17:39:45,680][INFO ][cluster.service          ] [es_node_1] new_master [es_node_1][Ohqfp4iaQnSTAWxJD6Pg8g][hostname.my.com][inet[/X.X.X.146:9300]], reason: zen-disco-join (elected_as_
master)
[2015-07-12 17:39:45,685][INFO ][cluster.service          ] [es_node_1] added {[es_node_1][Jc9vyUdrT4uh1Flyecy-Xg][hostname.my.com][inet[/X.X.X.146:9350]]{client=true, data=false, master=false},}
, reason: zen-disco-receive(join from node[[es_node_1][Jc9vyUdrT4uh1Flyecy-Xg][hostname.my.com][inet[/X.X.X.146:9350]]{client=true, data=false, master=false}])
[2015-07-12 17:39:45,723][INFO ][http                     ] [es_node_1] bound_address {inet[/0:0:0:0:0:0:0:0:9200]}, publish_address {inet[/X.X.X.146:9200]}
[2015-07-12 17:39:45,723][INFO ][node                     ] [es_node_1] started
[2015-07-12 17:39:45,775][INFO ][gateway                  ] [es_node_1] recovered [1] indices into cluster_state