if someone has blocked me, why do they appear in added me as added you back when i haven't added them

If Someone Has Blocked Me, Why Do They Appear in Added Me as “Added You Back” When i Haven’t Added Them?

someone blocked me but still shows up in added me why does snapchat won't allow me to add them

Someone Blocked Me but Still Shows Up in Added Me Why Does Snapchat Won’t Allow Me to Add Them?