New VMs are automatically associated with all available networks

Folks,

I am seeing a strange problem here. Whenever I boot up a virtual machine from the command line via "nova boot", it immediately appears to be associated with all available networks:

+--------------------------------------+------------------+--------+-----------------------------------------+
| ID | Name | Status | Networks |
+--------------------------------------+------------------+--------+-----------------------------------------+
| 6207a2a1-ca04-494d-bdbb-b4e58e4f0155 | fluxcapacitor | ACTIVE | admin-net=10.5.5.3; ext_net=10.20.7.132 |
| 5b920849-c24f-4eb0-98b1-ed31b33be5b8 | superfrobnicator | ACTIVE | admin-net=10.5.5.4 |
+--------------------------------------+------------------+--------+-----------------------------------------+

If I boot a VM from the dashboard I can select which nets I want it to associated with (and it works). In the above paste example, the first VM was booted via the command line and the second was booted via the dashboard with the appropriate networks selected.

ext_net is the network where my floating IPs would be coming from; please note that the newly started VMs are not assigned proper floating IPs. I looks like quantum creates a port for the VM but does not associate a floating Ip with it.

Please help!

Best regards
Martin