Talisa tells Robb about a wedding held in Volantis, mentioning that the drummers were playing for coppers. Coppers are a currency of the Seven Kingdoms, not Volantis; Volantis uses round gold coins called "honors."
Stannis, speaking about the siege of Storm's End, says "I thought my wife was dying. She couldn't speak anymore, she was so frail." Selyse (who was not present at Storm's End during the siege) was not Stannis's wife back then; they wed several years after Robert's Rebellion ended.