AWS site-to-site VPN tunnels

Hello Community,
I have a site-to-site VPN from my VPC to my on-prem data center terminating on a Cisco router for proof of concept. I have connectivity both ways and all seems to be working well but I have a question regarding the tunnels. Two tunnels are configured for redundancy. When I check the tunnel status both tunnels show up. Shouldn't one tunnel be down and only come up when the first tunnel goes down. Any clarity on this issue would be greatly appreciated. Thanks. - Tony Harris