Why can you see views in the views tab for pages that don't have a test?

The platform only includes pages involved in A/B testing in the actual results. The general Views table collects all views from every page. A server call is made, and a view is collected for every page because the script needs to call the server to determine what tests must be run for that page. If there are none, no test will be run, but the server still keeps track of the view that occurred.