In this episode, everyone calls Miss Julian "Carolyn" using a soft i sound (e.g. hit, bit). Throughout the rest of the series, she is known as Caroline, but it is always pronounced with a hard i sound (e.g. kite, bite).
There are 2 distinct types of voodoo practiced in New Orleans - Louisiana Voodoo and Haitian voodoo. The two types of voodoo and their beliefs are inconsistent throughout the episode. Secte Rouge is a part of Haitian voodoo. However, in Haitian voodoo, gris-gris bags are used for good, not evil. Bokors are Haitian voodoo sorcerers, however, bokors are not defined as "good" or "evil." This episode portrays all bokors as dark. Bokors are actually sorcerers for hire who can cast good or dark spells.
(at around 10 mins) Sam Potter says that the store is located on "Pontchartrain Avenue". While there is a Pontchartrain Road and Boulevard in New Orleans there is no Pontchartrain Avenue.