Facebook Limited Profile?

[Bro123]

So I added this girl a week ago, and she accepted my request. Then 4 days ago I noticed my friend list on my profile page became 1 less and on the friend tab in profile page I search for her I can't find her. So I go to the page where you can removed friend or edit them to become limited profile, I still see her on the list. Then when I went to her profile I still can see all her contacts, picture, vids and etc. So my question is the reason why my friend list is 1 less is it because she puts me on a limited profile that I can't see her when she's online? what do you think what happened to my Facebook?