Why would just one recently added friend remained on a Facebook timeline, but the rest are gone?

[Emily R]

Okay, I understand yeah this is a REALLY stupid question so don't point it out. Don't tell "not to worry about it" or "no reason", if you have an idea just let me know. It's my friend's timeline and she was scrolling down and we saw that at the very beginning of when she made Facebook there is our friend and it says "___ became friends with ___" but yet it's just that one person....is it because they have something turned on, like a setting that's different. I'm not really not sure if it's just a glitch or whatever, It could be absolutely nothing. I was just curious why the heck this person's notification would just stay there on her timeline and not any others. Sorry it's so pointless I'm just looking for the reason because i'm curious. Thank you

[Ronnie]

I think he might be her first facebook friend, and after that she has removed or hide her all friend activity from her timeline, she may forget to remove that post.