I am experiencing the same problem as impossible to delete a container.
In fact, I deleted the Container from the Bluemix Dashboard and the Container was still active and with the "Deleting..." status.
I also tried to free the IP address as indicated and by using the ICE RM --Force unfostunatelly without success.
ice rm --force da4c55c0-13c5-40a1-abc4-d7623583e5c4
Removed container successfully
But unfortunately the container is still here and in deleting state :
ice ps -a
Container Id Name Group Image Created State Private IP Public IP Ports
da4c55c0-13c5-40a1-abc4-d7623583e5c4 boardvisor idcware/boardvisor_new:latest Nov 26 12:15 Deleting []
I will appreciate a lot the help of the Bluemix Dev Team in order to solve my error.
This is a bug and only the DEV team can delete it definitely.
The container is most likely deleted, but it is still in the database of Bluemix which is read by cf.
You can open a new ticket here: https://support.ng.bluemix.net/gethelp/
Remember we will need is Org and space IDs and the container id in question when you will open the ticket.