I’m sorry if I’m not much help but I had to do that I-601 waiver of grounds of inadmissibility when I came to my Mexico appt in ciudad Juárez, until then I didn’t know about this waiver, my lawyer never told me either, I had to do it though because I was in the US more than 365 days I guess (even though I had already done the I-601A and had it approved) and because they wanted me to prove some other stuff. i had also been in the US since I was months old (I’m in my early 30s now) so idk if that waiver of inadmissibility was for that too but I thought the I-601A had covered that part.