Facebook privacy question (ten points)?

[Love]

I have had an album on facebook set so nobody can see it but me. It has been like that for about a year. When my brother clicked on my profile and went to view my photos (we arent facebook friends) he was able to view the photos I set ro private?!?!?! The pictures werent innapropriate

Other people were able to see them too?!? I dont feel safe on facebook anymore.

Why did this happen?

[Steven]

One of these things:
You really didnt set the privacy to only you
u did set the privacy to only u but the settings were set to default when u got the new timeline
ur brother is a hacker
someone hacked u
one of the few moments when facebook glitches up