Facebook friend request issues?

[Meowth]

I was scrolling through someones friends and came across another friends brother, next to his name it said 'respond to friend request'
However, i never received a notification for a request and it doesn't come up under my requests, only on his profile!
Why?!
just to add, the request doesn't come up under the requests icon AT ALL.

[pri✍]

You don't get Notification on friend request; you'll see number on the Friends Request icon on top bar, it's the first icon, if you don't see that number, you might have clicked that icon or there's a glitch, anyhow, just click that icon to see who sent you friend requests.

[Paul]

Sounds like a Facebook fault unless you have missed it.
Facebook seems to have a lot of faults at the moment so is what expect it is.

[pearl]

I think you forgot. Notification appears but you have not accept his request when that man send request to you.