Pandaria Archaeology and getting 20 of each project.

[Meil]

So I finally reached the 20 mark on one Mogu project. I had never gotten a pristine for it, til now(20th mark). So does anyone know if this means that once you get your 20, you are guaranteed a pristine and also, you will never get that same project again?

[Zulandia]

No to both questions.