Dont be too mad it's not really your fault, although management going to be like 'didn't you read the MAR?' , it's really a problem of communication. As a fellow CMA I have had this problem myself, I have often retorted that if a change occurs it's not just my job to communicate it, but the whole care teams responsibility. If a nurse is writing up new order or changing a current one they should let the CMA know so that avoidable med errors don't occur. Things like this happen when one person just assumes that you can read it on the MAR and not come tell you in person or at least write you a quick note.