It's hard have a religiously mixed family: religion is a very personal and sensitive matter. But when the entire family is not only one religion, but all members of the same sect, it shouldn't be a problem, right? Wrong, because people within even a single movement can't agree on the core theological/ritual issues anymore. What's weird, I guess, is that there are literally hundreds of Christian sects, so that every possible permutation of Christian theology is pretty well represented. But still, within the movements are fights like the one over infant/child baptism/communion, a disagreement at, at one time, marked the major divisions within Protestantism.
Maybe it's just the Anglican/Episcopal thing: having really not gone through Reformation, as such, they have to catch up.