[MB] Trying to get 2 IPs working in bridged mode on Aris XB6 600mbit plan

I'm trying to get my second IP working on my Shaw 600 plan. The chat techs say I'm provisioned but that the xb6 modem has an issue where it uses up one of the IPs. (which it does, when I go to 10.0.0.1 I can see the second IP) If I want 2 IPs to really work, I have to pay $10/month for a third IP with one of them wasted by the modem itself. (and as a test they provisioned a third IP and I was able to get both my routers online) The other option the chat tech gave me was to drop to 300mbit and their other modem. Does anyone have a working XB6 dual IP setup? Do you have a third IP listed in 10.0.0.1? (under connections/status) Does anyone know a contact at Shaw I can reach that can correctly provision 2 IPs?