Project Status set to TECO

When I set a project on status TECO. We can still do confirmations on the project.
Is there a setting or a way in which we can set the project to TECO and not be able to do confirmations on that particular project?
There is no link between TECO and actual confirmation. It might possible that the project is technically completed but non technical activities are still pending..
All WBS elements, networks and activities are set on status TECO in the project. I have set the status over a week ago and yet am still allowed to do confirmations to the activities in the project.
We did not experience this problem before. It is the first time and it happens for all projects that are set to status TECO.
If you have networks and activities involved your best bet is to use project builder to make a status change at the project definition level which will cascade down to wbs elements, network header and network operations.
You may try setting a DLFG flag and see if it prevents confirmations from occurring on the activities. If you need to undo the deletion flag the sequence is as follows:
Using CJ02 undo DLFG at project definition level then select all wbs elements and perform the same. using CN22 undo DLFG at network header level then select all activities and perform the same.
Project builder allows status set downwards but not undo on all components, therefore requiring CJ02 and CN22 to undo.