Facebook Wall Photos albums.. bug?

using the graph api me/albums method, I get two "Wall Photos" album entries.. with different types (normal, wall)

My understanding is: "wall" is used to store the wall photo posts and "normal" to store the photos posted in a friend's wall..

Question: Why is the type normal? shouldn't be something different to understand the album has not been actually created by t开发者_运维技巧he user? like other automatically created albums.. (profile, mobile, wall)

Every posts on the "normal" Wall Photos album are not really visible, because the album is not accessible from the UI.. so I need a way to filter this album out from the list of usable albums, but I would rather find a better way instead of verifying the name of the album..

Thanks in advance.