Realizing that AVOW's beliefs may be way out there in comparison with mainstream Mormon beliefs, they also appear to be build on that foundation. I think, as a rule, Mormon belief is that to do the best that can possibly be done in the afterlife you have to be married (in the temple, in their case). I don't know what exception, if any, is made based on age or gender other than if you aren't 8 years old I'm pretty sure you get a bye on baptism and everything else (with a few nonpertinent other things happening).
So it would make sense that AVOW might have a marriage requirement or at least would view you as less than if you are of a certain age and single.