It is a grammar issue. Words often have common uses that don't make grammatical sense. "Comprised" means "included" or "contained." You wouldn't say that a grou

It is a grammar issue. Words often have common uses that don't make grammatical sense. "Comprised" means "included" or "contained." You wouldn't say that a group was included of four people or that a group was contained of four people. It's semantically backwards. Confusing it with "composed" makes it more difficult for people to understand its meaning when it's used correctly.