When a Man Loves Two Women - S6-E21
Continuity mistake: Niles is trying to convince Frasier to play squash - he has his hands on the back of Frasier's chair. Cassandra comes out of the kitchen and we see one of Niles' hands on Frasier's shoulder. In the next shot, both hands are back on the chair, even though there was no time for this to happen naturally. (00:02:35)
When a Man Loves Two Women - S6-E21
Continuity mistake: Daphne and Marty are arguing about Cassandra and Faye. As the shot goes from one to the other, the spout on the milk carton goes from opened to closed and back again. (00:09:35)
When a Man Loves Two Women - S6-E21
Continuity mistake: During the scene where Niles is flipping a coin, the newspaper on Marty's lap is sometimes opened flat and sometimes folded over, even though he doesn't touch it. (00:09:50)
When a Man Loves Two Women - S6-E21
Continuity mistake: Before Frasier says "Enough, Dad!", we can see a spoon in Marty's cereal bowl. In the next shot it's gone. (00:10:15)
When a Man Loves Two Women - S6-E21
Continuity mistake: When Frasier is in his apartment talking to Niles, Marty, and Daphne about choosing between Cassandra and Fay, the milk on the breakfast table changes position several times - from behind the coffee pot and near Daphne to the other side of the coffee pot in front of Martin.
When a Man Loves Two Women - S6-E21
Continuity mistake: When Frasier and Fay are at her place talking on the couch, there is a throw that sometimes is at the end of the couch on the armrest and sometimes is on the back of the couch, behind Fay.
When a Man Loves Two Women - S6-E21
Continuity mistake: When Frasier and Niles are in the cafe, Niles says "So what was Fay doing at your apartment last night?" When he says this, you can see he has just started to stir his coffee with a spoon. The shot then changes and the spoon has vanished.
Answer: In the last episode, they explained that Tossed Salad and Scrambled Eggs is a metaphor for the mixed-up people to whom Frasier dispenses his radio psychiatric advice.