Yes, Aw searches are limited by what the WG's put in, and that can be a pain. When I started out, I wanted to cut out those who only offered massages by specifying "Penetration (protected)", but I was missing a lot of girls who don't say that they offer that, even though they obviously do! Same with those who don't specify that they want male clients, you won't just be eliminating lesbians if you search on that.
I find it's best to have some specific saved searches on girls with features that appeal to you - dress size, ethnicity, or whatever - but also keep a saved search that's going to include every girl in your area that you might be interested in, sorted by distance.