Will dependants visa extension(I539)approves before primary applicant(I129)?


My employer has filed H1 extension - I - 129 petition for me and my dependants (I539 APPLICATION) and, when I checked my case status online, my dependants visa extension(I539 APPLICATION) is approved however mine ( I - 129 petition)is still in Initial review status, my question is how do they approve my dependants visa extension before primary applicant?

Does it mean they have approved primary applicant also?