MrsKassie,
you can be part of a church and not believe in all aspects of the church your in
This is true for your husband since he is not part of the True Church. As a Protestant he is by definition a "protester" so he will be in the state of protest and disobedience until he converts to Catholicism.
But for you, a Catholic - as far as Faith and Morals are concerned you must agree whole-heartedly with the Church or you cease to be a Catholic (automatic excommunication).
Just for clarification, what aspects do you believe a Catholic can "disagree" with the Church on?
Thanks.