Continuity mistake: Season 7, Episode 23 - "Come On Over For Dinner": Right after Carlos kills Alejandro with the candlestick, he throws the candlestick to the left of Alejandro's body. But a few seconds later the candlestick has suddenly moved to near Alejandro's head.
Factual error: When Gabrielle becomes a widow she marries Carlos again in front of a priest. But the Catholic Church doesn't admit divorce, so in their eyes Gabrielle and Carlos were still married. They should have repeated a civil wedding, since only the civil effects of marriage were ended with their divorce.