I'm trying to set up TekRADIUS LT to only allow EAP-TLS and EAP-TTLS connections. I set the default group like this:

And a second group like this:
When I attempt an EAP-TTLS connection, it fails, and the log shows Unsupported authentication method. EAP-TLS connections are successful. Shouldn't the Next-group setting allow EAP-TTLS connections?
If I change the Authentication-Method to EAP-TTLS on the default group, EAP-TTLS connections are successful. EAP-TLS connections also continue to be successful. Shouldn't EAP-TLS connections be denied in this case, and only EAP-TTLS connections allowed?
I have the Default EAP method set to EAP-TLS under Settings > Service Parameters > Authentication.
Is this expected behavior, or am I missing something?
Thank you