Seems to me Vous vous êtes levé should also be accepted since you don't know if you are addressing more than one person.
It accepted it for me on 9/4/2021 but said I had a typo in my answer
"Vous vous êtes levé trop tard." ...wrong ?! This is nonsense!
Both are correct.
"Leve" should be accepted as well. How do we know that this is plural and not just formal?
No, not "leve" that doesn't exist written this way, it could have been "lève".
Mais ici c'est le participe passé du verbe qui peut être conjugé SANS accord "levé" (vous au singulier), ou AVEC "levés" (vous au pluriel).
I can't understand why is it vous vous être
I believe that it's "vous vous êtes" because the verb "lever" is reflexive, and this is the past tense form.. You could think of it as "you got yourself up too late." And vous is the formal or plural for "you" (vs. the familiar "tu."
You woke up too late ??
No. "Woke up" would have been... Vous vous êtes réveillés trop tard.
My answer matched the correct answer, yet I was told it was incorrect.