How to prevent Technicians from approving a Change Request Approval Level?

How to prevent Technicians from approving a Change Request Approval Level?

Hello all, 

I've been trying to establish a method of approvals for change requests that will function for my company. I have set up an approval level in the workflow for the change request that will seek approvals from the change manager and the CIO and is set to wait for all approvals before going forward. This functionality works great, but it comes with something that I wasn't expecting. As a technician, a role that we set up to be relatively restricted in Change Requests, I can click on the approval level in the CAB Eval stage, and then click "Approve level" and it will approve the whole level, even if both approvals haven't been responded to. Attached is an image of the approval level after having approved it. 

Realistically I don't expect that any of the technicians would do this in practice, but I am unwilling to risk it. Is there a way I can disable the technicians' ability to do this? Is this a permissions thing I have set incorrectly? 

Thank you

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