Why does Facebook do this?

[Kitty]

I was wondering, when you make a post, i know that you can change who sees the post, but i changed it to "only me" by accident, and now when i try to change it back to "custom" and i type in the friends that i don't want to see the post and when i refresh it, it still says "only me." Why is that? No unnecessary answers please, i really want to post something but i can't if it keeps saying "only me." thanks!

[MinaRockzâ„¢]

Only me is a setting that is applied to every post you make on Facebook. The other settings that are also applied to every post include the 'Only Friends' and 'Friends of Friends' options. The 'Custom' setting only affects that one post. It doesn't affect any previous or future posts on your Facebook.