NYSE Delays Opening of Three Stock Because of Brokerage Errors

Perhaps someone more knowledgeable than I can explain how this can happen: The NYSE delayed the opening of three stocks due to erroneous orders sent to the Exchange by a brokerage firm: Jefferies Group, Inc. (NYSE: JEF), AT&T (NYSE: T) and Wyeth (NYSE: WYE) due to a series of erroneous orders sent to the Exchange by a brokerage firm. Floor professionals recognized the problem before trading began, thus avoiding public trading at incorrect prices on the NYSE.