Hi Olivia,
I guess I know what you mean.
Visit Number can't help you in your case, because it is counted every time a visitor visits the site and its value would never be changed. Visit Number = 1 means the first time the visitor came to your site(Lifecycle, not the time period you have chosen)
I think what you want is sth like this
[img]ab.PNG[/img]
You can set "Visits = 1" with a Visitor Container to get the result you want. Or you can first add an empty visit container(with no rule) and another with a "THEN" operator into a Visitor Container which is "exclude".
Hope this would help.