Website question
 

I wonder if I am doing wrong. I pull up my reservation on CO.com after I am redirected there from UA.com. I click on change seats to look at the seat assignment. I work my way through that, when I am finished I am supposed to click on continue, but nothing happens. I want to return to the reservation page with all the details but I can't find any way to get back without opening another
window and connect to CO.com and so on. Is there no way to return to the reservation page from the seat plan?
I am afraid to try the "clear" button fearing that the seat selections are erased then or is that the "magic" button?