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This commit introduces the "SortedDirectories" amendment, which addresses two distinct issues: First, it corrects a technical flaw that could, in some edge cases, prevent an empty intermediate page from being deleted. Second, it sorts directory entries within a page (other than order book page entries, which remain strictly FIFO). This makes insert operations deterministic, instead of pseudo-random and reliant on temporal ordering. Lastly, it removes the ability to perform a "soft delete" where the page number of the item to delete need not be known if the item is in the first 20 pages, and enforces a maximum limit to the number of pages that a directory can span.