After doing some more digging, I figured it out. It was a VMWare thing. I had to set the virtual adapter with a security policy exception to allow promiscuous mode.
There seems to be another issue though - it seems as though there is another client out there on the WAN (albeit, on a different VLAN) using a pfSense box, because I see the same MAC address as what my pfSense box is using for my CARP MAC Address.
Is there a way to change the CARP MAC address so I can differentiate my MAC address from this other person's?