Plot hole: Dorothy's son Michael is twenty-two years old in season three. When Sophia and Dorothy reminisce Brooklyn, NY, 1954, Dorothy asks Sophia to babysit her children, one of whom is Michael. Sophia refuses, so Dorothy says "I'll just leave them with Stan's mother." They talk about Michael screaming when Stan's mother was watching over them. If Michael was a baby in the fifties, he should be in his thirties in season three.
Yes, We Have No Havanas - S4-E1
Continuity mistake: At Fidel's funeral, Sophia talks about him awakening feelings that she had not felt in 35 years. But earlier in the episode, Dorothy said that her father/Sophia's husband has been dead for 27 years. Also earlier, Sophia claimed to have showered with a man 22 years ago.
The Days and Nights of Sophia Petrillo - S4-E2
Continuity mistake: Dorothy mentions that her Grandma, the mother of Sophia, died at 94 when Dorothy was 6. However, in the season 3 finale, there was an entire scene showing Sophia's mother visiting Sophia and Salvadore on Mother's Day, accompanied by young but certainly adult Dorothy.
Brother, Can You Spare That Jacket? - S4-E8
Continuity mistake: At the end of the episode, the girls regroup after looking for the winning scratch-off ticket and Blanche says she found it. At that moment, she is not holding her purse, however in the very next shot, after the priest enters the room, she's suddenly holding her purse again without the girls ever having moved from their spots.
Other mistake: The first time they are in the house, Blanche says she is going to show them make up tricks in her bed room and the two girls go to her bedroom without asking where it is or which one it was while Blanche was still talking.
Character mistake: In the scene in the kitchen in which Rose says that Bob Hope could be her father, she tells Dorothy and Blanche that Gunter and Alma Nylund are her adoptive parents. Nylund, however, was her husband Charlie's last name, making it Rose's married name and not her maiden name. Nylund was not her adoptive parents' name.
Other mistake: There's a lot of talk about Pepe hurting his hands during his last boxing match. Unless there's something I'm missing, boxing gloves should provide adequate protection.
Continuity mistake: In this episode Rose says her cat Fluffy died (as a lie) and Dorothy says "Rose, you've never had a cat, you're allergic." When Blanche and Rose first meet she is holding a cat named Mr. Peepers, and looking for a place she and the cat can live. Another episode she says she had a cat named Lindstrom Lindstrom.
Suggested correction: After first meeting Blanche at the supermarket, Rose gave Mr. Peepers to a boy there. Dorothy could actually mean that Rose has never owned a cat for as long as Dorothy has known her. Regarding the allergies, people can be allergic to some cats, but not others. Or they will choose to live with a cat despite the allergies.
In another episode, Rose mentions her dog Rusty saved the family cat from a fire so she definitely lived with a cat for longer.
Continuity mistake: When the girls are singing to the baby, the blankets keep disappearing and reappearing on the baby carriage.
Continuity mistake: In this episode, Dorothy's son, Michael, is said to be thirty years old. When he married his wife in the season 3 episode "Mixed Blessings", he was said to be 23.
Other mistake: When Blanche gets her citrus plate in the mail, she receives it in a box. She takes it from the mailman and it shows a normally taped up package, yet she just lifts open the flaps like they aren't even sealed.
Continuity mistake: At Big Daddy's (Blanche's father) funeral/passing, Blanche shows Dorothy around her childhood home but it was revealed in season 1 episode 24 that Big Daddy had sold the property to pay for a music tour and to escape the constant reminder of his late wife, the house was named Twin oaks.
Clinton Avenue Memoirs - S5-E16
Continuity mistake: The front door of Sophia's former apartment is on the right wall, under the stairs. The fireplace is on the far back wall to the left, next to the foot of the stairs. But in the earlier episode, "A Piece of Cake", the front door is next to the stairs, there is no fireplace, and Sophia's bedroom door is where the front door is in "Clinton Avenue Memoirs".
Visible crew/equipment: At the very end of the scene at Sophia's new apartment, you can see a boom mic move above Dorothy's head.
Factual error: At the end of the episode Rebecca has her baby. When the doctor cuts the cord he hands her to Rebecca all clean and spotless. Babies have a lot of blood on them when they are born.
Other mistake: When Rose relates the story of her birth, she says that Ingrid died in childbirth, and her baby was left at the orphanage in a basket. Brother Martin didn't know of the child's existence until after she was adopted. So who put the baby in a basket, and why? If a woman died in childbirth at the hospital, with the baby's father unknown, the orphanage would have taken custody directly. Babies are abandoned in baskets by living parents.
Other mistake: Rose says that she was "eventually" adopted by the Lindstroms. Rose has previously stated that she lived at the orphanage for eight years. While "eight years" could qualify as "eventually," Rose also says that the Lindstroms took the beef sticks that were left in the basket with her, and that the basket contained cheese and crackers, as well. None of those items have a shelf life of eight years.
If At Last You Do Succeed - S6-E3
Continuity mistake: In the scene where Stan stops by the house to have Dorothy help him tie the bow tie of his tuxedo, the undone tie is hung around his neck. After Dorothy finishes tying the bow tie and Stan proceeds to leave, she stops him to tell him to return in an hour. He excitedly turns around towards her, at which point we can see that the bow tie is now a clip-on. (00:18:55 - 00:20:55)
Wham, Bam, Thank You, Mammy - S6-E5
Continuity mistake: When Mammy Watkins first hands the letters over to Blanche, the ribbons holding them together are knotted but the knot is on the bottom of the pile, and the strands are quite long. When Blanche reaches for them, the knot is on the top, it is now tied in a bow, and the strands are much shorter and neater.
Other mistake: Rose tells a story about her mother having undergone plastic surgery to look like Raymond Massey back when she still lived in St. Olaf. However, we see her mother in an earlier episode and she looked nothing like him.