Backup Technician

Backup Technician

We are using two technicians in SD, one recevies all of the reqeusts and passes more complex requests to the other. When the first tech is out of the office, there is no option to use the other tech as the backup.
 
The drop down shows the tech that is out and his name as the backup. I understand that SD looks to the sites for tech membership, and if not in use it looks to group memebership. I'm not using sites and there is only one group with both techs listed, so what else am I missing that I can't see the second tech to use as a backup?
 
Thanks!

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