Visible crew/equipment: In 1987, when Robert knocks out Duke in Keystone SD hotel, when Sean is tying Duke up, at the end of the couch, above Duke's head, you can see the camera moving. In 1985, when Robin is angry with Robert, the camera boom is visible. In 1986, when Duke is in the hospital, the shadow of the camera man is visible on the left side of Duke's bed in many scenes.
Other mistake: December 1986, when Anna comes to GH in her ball gown that she wore when she and Duke first met, the dress is not the same. It was sleeveless June 6, 1986. Now it has sleeves.
Visible crew/equipment: In the 1987 Mt Rushmore conclusion, when Robert knocks Duke out with the infamous WSB chop, the put Duke on the couch. When Sean is tying Duke up is apologizing to him, at the end of the couch for several seconds (behind Duke's head) you can see the camera man moving.
Continuity mistake: S57 E214. Jordan is wearing grey nail polish when she gives TJ the engagement ring for Molly. Next scene at the docks for a drug overdose, she hugs Taggert and the nail polish is black.
Factual error: 2017 episode - Valentin is revealed to be former stuttering hunchback who attended WSB academy with Anna. Can't be accurate because Anna is revealed to have been 26 in 1986 in a conversation with Duke. Robin was born October 1978, making her marriage to Robert around 1977 summer since they swam to Italy from France prior to marriage (Summer Swim). Puts Anna in WSB at age 17 or 18. Valentin is about 10 years younger than Anna. He would have been 7-8 when Anna in WSB Academy. No way they were there together.