When you work on a family where the family structure isn't know with any certainty, do you "rush" to enter the details of each person in your database, including the relationships? If you don't have other information that indicates the children in a census are those of the oldest man and woman in the household, should you enter them all as "parents and children" in your database? This is especially true for pre-1880 United States census records where relationships are not given.
There's no rush to enter in relationships when you aren't "reasonably" certain what they are. Wait. Take your time and look at other records.
Or you may just be confusing yourself and others down the road. Not intentionally--but confusion is confusion whether you mean for it to be or not.