hello Zach,
i know this is an old post, but what you posted as a document looks to be usefull,
i'm running two services, the first for users with 802.1x (for AD users), and the second for MAC auth (with device profiling),
i'm wondring if my switch port can be configured like the following:
interface fast 0/1
switchport access vlan yy("default vlan")
switchport mode access
authentication host-mode multi-domain
authentication order dot1x mab
authentication priority dot1x mab
authentication port-control auto
authentication periodic
authentication timer reauthenticate server
mab
dot1x pae authenticator
dot1x timeout server-timeout 30
dot1x timeout tx-period 10
dot1x max-req 3
dot1x max-reauth-req 3
spanning-tree portfast
which mean without "switchport voice vlan zz",