suppress comput node not completly OK

When i suppress a comput node using fuel dashboard , i have to execute 2 actions to have no trace of suppressed node in openstack dashboard in "information systeme" part , in "service de calcul" and "agents reseau"

To be clean , mandatory actions :
with mysql client DB nova :
delete from compute_node_stats where compute_node_id=(select cn.id from compute_nodes cn, services s where cn.service_id=s.id and s.host='node-xx');
delete from compute_nodes where service_id=(select id from services where host='node-xx');
delete from services where host='node-xx';
With neutron client :

neutron agent-list
+--------------------------------------+--------------------+---------+-------+----------------+
| id | agent_type | host | alive | admin_state_up |
+--------------------------------------+--------------------+---------+-------+----------------+
| 1282e815-a320-4266-aae6-4dbd7080847a | Open vSwitch agent | node-29 | xxx | True |
| 1806e04a-56f3-4fdd-b5f0-43fc9c85043e | L3 agent | node-25 | :-) | True |
| 70a3322b-beed-4ea3-a32e-13c53969400e | Open vSwitch agent | node-25 | :-) | True |
| 756e43ae-f582-4dd5-8130-7a07a6511101 | Open vSwitch agent | node-28 | xxx | True |
| 92fed948-8a22-4523-8a44-f3de6a85593e | Open vSwitch agent | node-23 | :-) | True |
| bbfe28ec-6f3b-47aa-aca0-b6b93565daf7 | Open vSwitch agent | node-27 | :-) | True |
| d0b4ec0f-9731-4488-bc7e-0a8480edc7c1 | DHCP agent | node-27 | :-) | True |
| d5c44644-d510-45a9-9f20-0ed90a170895 | Open vSwitch agent | node-26 | :-) | True |
| d69d51a8-201f-4353-b97b-2e551b54134a | Open vSwitch agent | node-24 | :-) | True |
+--------------------------------------+--------------------+---------+-------+----------------+
root@node-24:~# neutron agent-delete 1282e815-a320-4266-aae6-4dbd7080847a
Deleted agent: 1282e815-a320-4266-aae6-4dbd7080847a
root@node-24:~# neutron agent-delete 756e43ae-f582-4dd5-8130-7a07a6511101
Deleted agent: 756e43ae-f582-4dd5-8130-7a07a6511101

Is there a bug of Fuel 4.1 , or openstack problem ?????
Thanks