Using Snapshot for Migration

I am trying to take a site that I built on my network and migrate it to a domain off of the multisite network. The network site is I took a snap shot of that site and I just placed the zip file on my desktop. Then i logged into the offsite domain and I installed SnapShot plugin. I then added the zip file and restored the site. However when I restored the site I ended up with my main site installed. I tried this with the plugin updraft plus and the same thing happened. Thanks for any advice on this.