HiroshiMishima: Why the heck does it revert to "By Purchase Date" when you click that? It's pretty user unfriendly when you had those 100+ titles all organized the way you wanted to, and suddenly it's like someone dumped a jigsaw puzzle onto the floor.
I always had it set to Manual. I'm pretty sure it didn't used to go back to "By Purchase Date", has that been added as of late? I do remember the games used to show up at the bottom, rather than the top. I wouldn't even mind them showing up at the top, so long as it didn't reshuffle the rest of the list.
If you click back on "manual" it should restore the order you had; you haven't lost your organization. It's just a quick way for you to see what it is that you just bought. :)