Skip approval based on source not working

Summary:

Following a support article, I am unable to follow directions for more than one lookup code, preventing me from skipping approval for multiple sources.

Content (required):

I need to skip approval (or auto-approve) invoices based on Source. I have multiple sources with this criteria and I have attempted following directions from this support ticket. I am able to follow them, but when I attempt to do the last step, I get an error for the lookup already having that meaning. (I cannot have duplicate meanings under the same profile value). How can I set this so multiple sources skip approval?