Greetings from Viovio!
You can change the arrangement of the pages in Step 1 of the Designer by clicking the "Arrange Pages" button at the top of the page! This will let you change the arrangement to whatever you choose.
If you find that you are having problems progressing from Step 1 to Step 2 we find that that is usually a browser concern. We suggest using either Firefox or Google Chrome as your browser. If it behaves glitchy then we suggest deleting your cookies and emptying your cache.