You are still thinking about things in terms of a page ordering for the entire song, versus a page ordering for an individual file. Instead of thinking about this in terms of JPGs, think about it in terms of multiple PDFs. If you added two separate PDFs to the song, and wanted to use only a couple pages out of each PDF, you would need to be able to specify an independent page order for each file. That's why when you tap on each file in the song editor, a different page order is shown that corresponds to the currently selected file.
So, back to your example. You have two one page files that happen to be JPGs. MobileSheets does allow you to change pages between these files, but it wouldn't make sense for you to say, "I want to use page 2 of my one page file", which is precisely what you are trying to do. Obviously when using JPGs, you would prefer to be able to specify a page ordering for the entire song instead of per file. This would introduce a huge amount of complexity though, because you can actually mix and match PDF and image files. So how would you combine the concept of page orderings per file with a page ordering for the entire song? It would just become a mess. That's why I don't support that concept for image files (and why it's better to use PDFs for what you are trying to do).
Having said all that, like I said before, you will need to add the same files to the song multiple times if you want to repeat pages, and I will add an option to duplicate files in the song so you don't have to manually browse for each file to add it. Then the steps would be as simple as this:
1) Import the two JPGs.
2) Long press jpg 1->select duplicate file. A third entry is now present in the file list that matches the first file (both reference the same file, no copy is made)
3) Long press jpg 2->select duplicate file. A fourth entry is now present in the file list that matches the second file.
4) Repeat as necessary for each time you want the pages repeated
I don't think that's so bad personally. If having access to the page order dialog is confusing with JPGs (which it apparently is), then I'm going to disable the page ordering for everything but PDFs.
So, back to your example. You have two one page files that happen to be JPGs. MobileSheets does allow you to change pages between these files, but it wouldn't make sense for you to say, "I want to use page 2 of my one page file", which is precisely what you are trying to do. Obviously when using JPGs, you would prefer to be able to specify a page ordering for the entire song instead of per file. This would introduce a huge amount of complexity though, because you can actually mix and match PDF and image files. So how would you combine the concept of page orderings per file with a page ordering for the entire song? It would just become a mess. That's why I don't support that concept for image files (and why it's better to use PDFs for what you are trying to do).
Having said all that, like I said before, you will need to add the same files to the song multiple times if you want to repeat pages, and I will add an option to duplicate files in the song so you don't have to manually browse for each file to add it. Then the steps would be as simple as this:
1) Import the two JPGs.
2) Long press jpg 1->select duplicate file. A third entry is now present in the file list that matches the first file (both reference the same file, no copy is made)
3) Long press jpg 2->select duplicate file. A fourth entry is now present in the file list that matches the second file.
4) Repeat as necessary for each time you want the pages repeated
I don't think that's so bad personally. If having access to the page order dialog is confusing with JPGs (which it apparently is), then I'm going to disable the page ordering for everything but PDFs.