Moving "all other sites" to "my paid sites"

Site URL: https://evolutionarystate.com

I have not used squarespace in quite some time. I guess back when template switching was available you could build a diff template website and then when it was ready, you could make it live. I subsequently clicked "create new site" and built the website and now it shows up in "other sites"!  I do not want to do this all over again, how do I make my "other sites" website my paid one? Do I really have to cancel and resubscribe? 

Yep, each website is tied to its own billing account. I'd recommend getting in touch with Squarespace Support and letting them know what you'd like to do. They'll walk you through the cancellation process and have been good about giving pro-rated refunds on the old account.