VM Pager Notification Double Message

I am running Distro 2.210.62-5.

I have a few users who are sending text messages to their phones when a VM is left. They setup the appropriate email address in the “pager notification” configuration. Problem is that the users are receiving 2 texts for each voicemail that is left.

The sendmail logs seems to indicate only 1 message is being sent; however, I am unsure how to check the recipients on the message.
Mar 11 13:12:16 pbx postfix/smtp[21546]: 8982D21755C: to=[email protected], relay=smtp-bb.vtext.com[]:25, delay=1.4, delays=0.51/0.03/0.69/0.18, dsn=2.0.0, status=sent (250 ok: Message 1164631447 accepted)

Any ideas on how to further dig into this?