ASK PJIANG AGAIN: Can H4 used EAD,AOS and not H4 Status, extend

Thank you very nuch. I got Q1 and Q3(Sorry had the stupid Q3). Make sure Q2 again:
H4 used EAD for 3M, should be AOS and not H4 status right now. Right? H1 didn\'t use EAD and keep H1 status(485 pengding not visa #). He can extend another 3 yr(after 6 yr).
Can H4 who used EAD, is AOS not H4 status, still extend H4 3yr with H1 extend 3yr together? Thanks!