Just found out I have 2 external IP addresses

I was trying to troubleshoot a home networking issue, and I plugged my laptop's Ethernet cable into the second bridge port. I thought it would recognize that the device wasn't a router and assign a local IP address behind a firewall. Nope. Windows was assigned an external one.
I suppose now I have the option to have my self-hosted services hosted on a different IP address.
Kinda scary that my isp just allows unknowing customers to expose their equipment to the net
If you're wondering, yes, I did change the IP addresses before posting this