The posts may or may not be ordered in the same order that they are selected, there isn’t any way to tell. There isn’t a simple way to order posts by post type. You would need to modify the sql query that is being done by adding a filter before the query and then removing it when you’re done. Here is an example of altering results by post type. You’d need to modify it to also add ordering by title. https://stackoverflow.com/questions/15675296/wordpress-order-posts-by-post-type
