I didn't design the source pages to be browsed; most users will get there via citations, which link to sources, and so it doesn't matter much where they are: the browser opens the right source page and scrolls to the source.

I'll consider different sorts, but it probably won't happen soon. SS doesn't know which sources are going to be referenced until it finished building the person pages, by which time all those pages have links to the source entries. I'd have to leave place holders and then go back and fix the links in order to put them in any better order than they are in already.