One of the most important things in MA training is you can't expect the teacher to suddenly give you the "secrets", and always be telling you everything. You need to find things out for yourself.
On the other hand, it is a fact of TCMA history that virtually all styles had "secret", or closed door systems/forms/techniques, etc. This is just a plain and simple fact of history. It's the way it was. In almost all martial arts (there's usually an exception to the rule in most cases) there was a public style, and a family/closed-door style. If you were a family member, or a disciple student, you would be given much more by the teacher than the regular public students.
"Duifang jing zhi meng ji, wo fang tui zhi ce fang xi zhi."