How to block family from seeing posts on facebook?

[Accident Prone]

I made a new facebook, one for friends only.
But every so often I hear my parents say "That post you did the other day was funny" How are they seeing my stuff still?
I have everything set to "friends" only.
Is it because my email is connected to the email I use for my family account?

[Ammar]

its very easy, when you write your post then you see right sight bottom, (public or friend) has been select.. just change it
go to drop down menu, then select 'Custom' then You see These people or lists select there Specific People

Add Specific people, you want to show your post.

thats all

[U21]

If they are friends or subscribed to any of your friends news feeds, then they can see whatever is on their friends timeline if the post is shared or liked. You can reverse this by going into the privacy settings in fb and setting your posts to only me, then you can share particular posts manually to whom you choose

[Albert]

Make your post as manage as public or private to protect or seen by some specific people that you want.

[Daniel]

Are They On your Facebook That may Be One Reason Why Or its Possible if you Left your Facebook Open if They Happen to Go on your Computer they Could've Possibly Read it Or Maybe Another Friend of Theres Showed It To Them if you Set it to Friends Only If They Are Not on your Friends List Than you Done All you Can Do