At the US Census Bureau...
From the definition of "family household":
... The count of family household members differs from the count of family members, however, in that the family household members include all people living in the household, whereas family members include only the householder and his/her relatives.
From the definition of "family":
... The number of families is equal to the number of family households, however, the count of family members differs from the count of family household members because family household members include any non-relatives living in the household.
In their definition of "family" quoted above, I would change the first comma to a period, and use a capital "H" for "however". It is a simple fix.
The simplicity of the fix, unfortunately, may make it seem as if the error is not a significant one. However, the error is significant.
(The simple fix should NOT be made to their definition of "family household".)
For me it is a problem. I got distracted because they don't know how to punctuate the word "however". Because I got distracted I'm not going to remember the definitions. When I need them again, I'll have to look them up again.
