whether you are F-1 or F-2 really makes little differnce to the parents' chance of visa. The chance is based on whether VO feels parents will come back by the time they promised on the application.
Your info is on the SEVIS now, but VO may be (or may be not) able to find it.
Your info is on the SEVIS now, but VO may be (or may be not) able to find it.