Can somebody help me identifiy the one episode where Rose tells Blanche and Dorothy that her and Charlie made love every night except for one in their whole marriage. When blanche says she is surprised cuz rose never talks about sex, Rose responds...in her opinion people who talk about sex do not know much about it haha!

It's the second season episode where Dorothy's daugher Kate announces her husband Dennis has been cheating on her, while the subplot has Rose & Blanche watching I Love Lucy marathons.

What I found to be disconcerting was the fact that different actors played the same characters, especially with family members. There were two completely different looking women playing Gloria (Dorothy's sister, Sophia's other daughter), two completely different looking women playing Kiersten (Rose's daughter), a very heavy woman and then a thin woman playing Rebecca (Blanche's daughter), two completely different looking women playing Stan and Dorothy's daughter, and two completely different looking men playing her husband, but the worst of all, two completely different men playing Stan and Dorothy's som Michael: really bad because the first Michael was 30 years old while the second was only 21! How did he lose nine years over the course of three years, and wasn't Dorothy a tad old to even have a 21 year old son? Then there were the grandchildren: Blanche's daughter Janet had a 15 year old son, David, very early in the show; but when Janet makes an appearance in the later years, she is the mother of a four or five year old girl, and certainly does not look old enough to have a son who by that time would be pushing 20! The show really needed to get its time lines straight.

A couple of the examples you mention I can understand the different actors.
Both Dorothy's sister Gloria and Rose's daugher Kirsten first appeared in Season 1 and then not until Season 7. It's not surprising there would be different actors after a six year gap.

I believe you are mistaken on Dorothy's son Michael. The same actor played him 3 times. It's the character's age that kept changing - he was 29 in Season 2, 23 in Season 3 and 30 in Season 5. In his last episode, Dorothy's grandchild to be was forgotten.

Blanche's daugter Janet was constantly mentioned during the show's run, but the character didn't show up until the 2nd last episode of the series - the episode where Rose has a heart attack. It's also the episode with the 2nd Kirsten. It was like GG felt like they had to finally show Janet. They really de-aged her.

As for Blanche's daughter Rebecca, by Season 5 GG had new writers and that could explain the major character overhaul.

There is much more I can say, but I am running out of time now.