Are the "default" ones? Basically, the ones that show on your profile? :?

They're random, I think. I always thought they were, and they changed everytime you saw your profile.

It's only random if you never alter them - Note, once you arrange them, it cannot be reversed. You won't be able to get random again :P (Except new stickers which appear at the top which you have yet to arrange)

Just go view your sticker page and get rid of the end bit of the url like so. or the simpler way is from Games - Sticker Album

then drag and drop :D and save :P