Since each Church of Christ is "supposedly" autonomous there can be differences in doctrine. Over the years there have splintering in the "denomination" over issues (from what I gather) because they do not have a systematic approach to theology. So there have been conflicts over whether or not they should have sunday school, use one cup only during the Lord's Supper, whether to give to Christian colleges or mission agencies and whether or not it is a sin to use musical instruments in worship services.
Since I don't know which one it is that the boyfriend goes to, I guess I am at a disadvantage. I do know they are required to attend three nights a week....women don't pray in public...and if they get married, she has to consent to raising the children in the church.
This is the truth.
The big splits have revolved around:
whether to use 1 cup at communion or individual cups.
whether Sunday school programs were legitimate
whether churches can support charitable works as churches, or whether it has to be done by individuals only.
There are other splits. They have no way to reconcile differences of opinion except to split.
Nothing wrong with no musical instruments. But, some of the other stuff there is odd...