Forwarding more than one domain to a specific page

Site URL: https://www.twotitmicevodka.com/two-titmice-foundation

I have forwarded the domain http://twotitmicefoundation.org/ successfully to the page https://www.twotitmicevodka.com/two-titmice-foundation previously. And now my client also wants the domain http://twotitmicefoundation.com/ to be forwarded to that specific page as well. I changed the DNS settings as the tutorials on Squarespace suggest and like I did previously but it is not forwarding correctly. 

Is there an issue with more than domain being forwarded to the same page? Or am I doing something wrong?