dual wan setup with openvpn client, not failing over

imhouse

i have a cable based primary ISP. i have been having problem with them of late so i have been looking into getting a cellular backup. i found the netgear lb1120 device and i picked up a prepaid sim card. i am using a white box pfsense machine that i built; it has a dual NIC intel board. because of the limit on the onboard NICs i am using VLAN for the WAN and LAN connections in pfsense.
i have the ISP cable modem plug into my main switch port #1 in access mode, VLAN10, and the lb1120 plug into switch port #2 in access mode, VLAN20.
switch port #3 is in trunk mode with VLAN10 and VLAN20
i have create the corresponding VLANs in pfsense with the correct NIC and then create the pfsense interface for each WAN connection. WAN for the cable ISP and WANC for cellular
this is a home setup so both WAN connections provide DHCP IPs for the public address
wan_dhcp has 8.8.8.8 configured for its monitor IP
wanc_dhcp has 8.8.4.4 configured for its monitor IP
pfsense default gateway is set to wan_dhcp
i created a gateway group called wan and put wan_dhcp and wanc_dhcp. wan_dhcp is tier 1 and wanc_dhcp is tier 2. trigger level is set to member down
i have two openvpn client configuration in pfsense, the interface on both is set to GW Group wan. the two different openvpn connections are using the same port to connect on.
not sure that it matters but for completeness, the lb1120 is running in router mode. so the pfsense wanc interface get a RFC1918 address. the subnet that the lb1120 is configured for DHCP leases is not in my current network architecture so there is no routing problems because of it. i have tried to run in bridge mode, but the lb1120 only stays online for about 5 minutes at a time before it drops its LTE connection and reboots. in bridge mode i do not have that problem. in pfsense on the wanc interface, i have unchecked the two check boxes for reserved networks because of this
when my ISP connection drops i check status -> gateways -> gateway groups in pfsense. i see that wan_dhcp offline and wanc_dhcp online. so i should be up and running the on cellular connection now. also when the ISP connection is down, the wan_dhcp address gets set to 192.168.100.10. not a subnet on my network so should not be a routing problem
i then check openvpn client. status -> openvpn -> client instance statistics section. both openvpn clients configured in pfsense are down. i try to restart them and same outcome

things that i have tried:
#1:
- i stopped the second openvpn client from reconnecting.
- created a floating firewall rule on wan and wanc interfaces to route the traffic using the advance rule setting for the gateway group wan. i turned on logging for the rule.
- restart the openvpn client, failed to connect
- i see the rule matching and getting logged in the firewall log. interface is wan (has a triangle beside it) source is 192.168.100.10 and destination is the correct openvpen server ip for this connection
--- confused why the interface says wan and not wanc and why 192.168.100.10 was listed as source address
- there is no outbound NAT for that subnet, since it is not a subnet that i use. i created a outbound NAT rule for that on both WAN interfaces.
- restart openvpn client, still did not connect

#2
- tried to change the openvpn client interface to other choices in the drop down.  
	- wan was not an option.  wanc was
	- any - there was no difference between interface set to GW Group wan and this option
	- localhost - openvpn client still did not connect but in the firewall log, i see the source as 127.0.0.1 instead of 192.168.100.10
	- wanc - openvpn connected and traffic was routing over the tunnel correctly

` #3
- openvpn client interface set to GW Group wan
- started a packet capture in pfsense for the wan interface
- restart openvpn client, failed
- stop capture, downloaded, and opened in Wireshark
- none of the openvpn traffic was in capture

` #4
- openvpn client interface set to GW Group wan
- started a packet capture in pfsense for the wanc interface
- restart openvpn client, failed
- stop capture, downloaded, and opened in Wireshark
- openvpn traffic was in capture
- source IP is 192.168.100.10, destination is the correct IP for the openvpn server
- i had packet capture running on the edge device on the openvpn server network. the openvpn client traffic never reaches the server network

what am i missing or doing incorrectly?