Can't Restore From snapshot on old wp install

I backed up 7 sites from my old multisite server to restore on a new multisite server. The new server is at “http://dev.” versus the old server at “http://www.”

When I edit the snapshot it states: “This archive is from a previous import action. The information from the archive did not match the current blog. So before you can change the configuration you need to assign it to an existing account.”

It shows the correct URL of the new server but the problem is that the url it shows when I click change has an extra “/” so it looks like “//” before the field where I enter the blog id number.

When I enter say the number 10 (which is a valid blog id) and click lookup the word “false” appears before the URL and no blog url is displayed.