Discrepancies.

Between one ceremonial and another.They exist, it seems. The Confraternity says that at the gospel, for example the thurifer should not swing the thurible. The Baltimore Ceremonial says that he should swing it, to keep the coals alive. The Ceremonial also says that the acolytes bow low during the celebrant's communion, but the Confraternity makes no mention of it. Then there are little things (The Ceremonial and Baldeschi say who folds the chalice veil at the offertory, while the Confraternity doesn't. It does say who helps the subdeacon with the humeral veil though.) And none of these make mention of a Crucifer, or what he does. But since a lot of that may have been up to local custom, I guess it does'nt really matter.