I saw in an edit summary on another page Ser Shield McShield said that the middle heraldry is used for former allegiances. In that case, shouldn't the Maester chain and the Targaryen shield be switched, since he became a maester of the Citadel and then renounced his Targaryen name when he joined the Night's Watch? ~ Lilyflower422 (talk) 23:17, July 10, 2016 (UTC)
A person renounces their family name by becoming a maester so the shields are in the correct order. But Aemon is unique in being a member of two orders at once so putting the maester chain in the middle is there because we don't have another place to put it.