In reply to Kurt Alden:
Don't worry about the ratings. Progressing isn't about being able to pick a grade a climb every route at that grade, it's about constantly testing yourself.
Also all walls, more than crags, have dodgy ratings, because there are fewer sequences to compensate for different physiques and abilities.
The other thing that beginners rarely consider when critising ratings is that becuase they are inexperienced there are often gaps in ability. Don't blame the ratings if you find something you can't do, instead work out why you can't do it and improve. The rating MAY be wrong, but so what? If you want to improve, indoor ratings are nothing but the vaguest of guides, even to very good climbers.