Hid a Facebook post from someone, and they still saw it.?

[Pablo]

I often hide certain posts from certain people on Facebook, by clicking the 'CUSTOM' button under the post security, add include the people under 'Don't share this with' that I do not want to see the post. Well, today, I hid a post from a guy on my friends list, and logged on to find that he had liked that same post. I checked the security settings for the post, and his name is under the 'Don't share this with' list! How did he see it, and what settings do I adjust to make sure this doesn't happen again?

[♣Ally♣]

Same thing happened to me. Glitch maybe? Very inconvenient!