Sophie Deveraux said that witches from New Orleans practice Ancestral Magic. She stated that if a witch leaves New Orleans their access to magic is cut off, they cease to be a witch. However, Finn left New Orleans but was still able to practice magic.
It is unknown if he was still able to practice magic due to channeling Esther and Mikael.
When Tatia is running away from Elijah, a stunt double can clearly be seen in place of Tatia.
When the stunt double, portraying Tatia trips and falls, the dress tears and can be clearly seen around the right shoulder. However, when Tatia gets back up, the tear is gone.
When Tatia finds Elijah and Klaus covered in blood, they could not compel Tatia to forget what she had seen; Esther transcribes this to the fact that her sons had only been vampires for a couple of days, therefore had not learned compulsion. In Ordinary People, however, Rebekah tells Elena that the sun kept them indoors for weeks until Esther created Daylight Amulets — there is no explanation as to how they could be in the sun shortly after they had been turned if they were kept indoors for weeks.
Furthermore, Elijah's daylight ring is seen in the flashback; there are inconsistencies as to how long after the Mikaelson's turned that their daylight rings were forged.