Steps to reproduce:
- On the Views list page, click the Add new view button
- Configure a basic view
- Click the Save & edit button
- Make a change but don't save the view
- Go back to the Views list page
- Delete the view created above
- Click the Add new view button
- Create a new, different view (like a block instead of a page, or using a different display format) with the same name (actually, with the same machine name)
- Click the Save & edit button
- You'll be looking at the first view that was deleted
I suspect the initial view is still saved in the object cache and then that is what is being displayed when creating the second view.