Concurrent Filing H4+ H4 EAD

Filed h4+h4 ead concurrently to phoenix lockbox facility based on spouse H1 petition ‘SRC’. My application has been accepted and today received e-notification with receipt number starting as WAC.

Is this normal? Since H1 had petition as SRC, I was expecting the same petition SRC as well. Some people told in some blogs that they received petition with SRC name on it.

But it clearly mentions to file the concurrent petition to Phoenix if the spouse H1B receipt starts with SRC.

Any help or clarification on this will be appreciated Thanks!