Goof 3: Fred takes a bite of an apple out of the fruit basket but when the Ricardo's notice later the close up shot shows an orange.
Goof 2: The old times that Lucy and Ethel remember actually happened in the Ricardo's first apartment, not the current apartment that they are moving out of.
Goof: The wall lamp next to Ricky's bed has now been replaced with a painting.
Notice the fireplace in the Ricardos' bedroom. We won't see the bedroom again until 1958 in the one-hour episode #7, "Lucy Makes Room for Danny" when the fireplace has mysteriously disappeared.
When Lucy can't get to sleep because of all the country quiet she suggests that Ricky take up snoring, presumably because he doesn't snore. But in the Bull Fight Dance episode in season 4, Lucy has to fill out a questionare about Ricky for a magazine and the questionare asks if Ricky snores. She answers yes by trying to spell out the sounds that Ricky makes when he snores.