Uploading different looking pages in Vertical Format *SOLVED*

I understand that once a comic is created you cannot toggle between the vertical scroll format and other formats between pages (Such as:  first few pages are verticle scroll and the rest traditional). However, I wanted to test uploading a traditional-looking page, but have it uploaded in the scroll format. The wheel just kept spinning and it never uploaded the page (or pages). Can I not do this or is it another issue? Thanks!

EDIT: I was able to upload it so I could preview it. I suppose that heavy traffic when I was trying earlier was likely the issue. :)