Continuity mistake: In this episode, Blanche was talking about how she learned of her late husband, George's, death. She said she got the phone call late at night and the officer on the phone (chewing potato chips), told her that her husband was killed instantly in a accident. But in another episode, Sophia made a comment about how Blanche was getting a pedicure while her husband was dying in the hospital. Blanche admitted to this, so it was not one of Sophia's smart remarks.
The Engagement (a.k.a) Pilot - S1-E1
Other mistake: When Dorothy explains to Rose about her ex husband Stan she mentions he is a 65-year-old man. If they were in high school together and she's in her 50s wouldn't that mean he would be 50s as well?
Continuity mistake: In the pilot, Blanche's bedroom is to the back left, not down the hall. From the series' second episode on, the lanai was out of the back left door and all the bedrooms are down the hallway.
Visible crew/equipment: Blanche and Rose are rehearsing their tap dancing routine. At the end of the routine, Sofia walks in and the boom mic becomes visible on the top right of the screen, moving toward her. (00:32:15)
Continuity mistake: Blanche says she can't go to the Sinatra concert because her final exam is that night. In the first classroom scene, the chalkboard says that the final exam is in four weeks. But before Blanche gets home and tells the girls that her teacher wants her to sleep with him, Dorothy says the concert is in two weeks. It is the same day, since Blanche is wearing the same outfit and she wouldn't wait two weeks to tell the girls about her teacher.
Guess Who's Coming to the Wedding? - S1-E2
Visible crew/equipment: When Dorothy and Stanley are talking outside, the camera rolls into frame on the left-hand side. (00:22:48)
Continuity mistake: When the women are sitting at the table outside, Lily insists on pouring everyone's lemonade. She is shown pouring the first 2 cups, then in the very next shot the remaining empty cups are gone from the tray and everyone has their cup of lemonade.
Revealing mistake: Dorothy is putting wet washcloths on Blanche's forehead. But if you look in the bowl on the table, there is no water in it at all. And when Dorothy wrings out the washcloth, only a tiny bit of water comes out. (03:05:00)
Job Hunting - S1-E22
Continuity mistake: In season 1 episode 12, the wallpaper and wall decorations are changed in the kitchen but in this episode they revert back to the original.
Suggested correction: That's because the episodes were aired out order than when they were produced. This episode was the second episode produced (production code "002") whereas episode 12 was the 14th episode produced.
The Engagement (a.k.a) Pilot - S1-E1
Other mistake: When Dorothy and Rose go back to Blanche's bedroom to ask her about her engagement to her BF Harry, they use the entrance that is normally used for the lanai. Possible set change.