The Dukes - through their ancestors - could have stayed if they hadn't found the deed because of something called adverse possession; if someone occupies land for many years, etc., and the real owner makes no attempt to force them off, the occupant can claim title.
In the scene where the James boys rob the stagecoach, John Schneider's fake moustache nearly falls off and he has to quickly re-attach it.
How could Dixie be the Dukes' cousin? It's true she is never called "Dixie Duke" in the show, only "Dixie," so when she eventually had Daisy's grandfather or grandmother, then she could have changed her name when she got married. However, Sixie must only be related by marriage to a cousin we didn't meet in this episode, or she (I apologize to anyone living in the South) married a member of her own family. Or, she could have had a child out of wedlock, but somehow I think that she would have given it up for adoption.
We're supposed to believe that Frank and Jesse James were being outsourced to rob stagecoaches in the backwoods of Georgia? The James brothers crime sprees were mostly in the western and midwestern United States, and Hazzard is supposed to be located in the Deep South. This is a real stretch. Jesse James did rob a bank as far east as West Virginia once, and Kentucky a couple times. But, his furthest trip South was in Muscle Shoals, Alabama, in 1879, after Frank had seemingly settled down. Jesse and Frank were in Nashville for a time before Frank settled down, and Hazzard is just across the state line from Tennessee (as shown in "Daisy's Shotgun Wedding.") However, it's a real stretch to say the James Gang actually robbed a series of banks there.
Boss: It looks perfectly legal to me.
Rosco: Yeah, and if it looks legal to him, it looks legal to me.
Uncle Jesse: J.D., we all know the only two things you ever did that was legal was be born and marry Lulu.
Joe: How do you know my name?
Jesse: Makes no nevermind. Good-bye, Mr. Duke.
Hank (riding up on his horse): That ain't no way to start a lasting friendship.
Joe: Well, they already know what I look like. So I'll just go on back to the farm and help out Uncle Jeramiah and Aunt Jenny.
Hank: With any luck, they'll think you're the only kin with the time and the guts to do it.
Sonny Shroyer (Enos) does not appear in this episode, either in the present or the past sequences.
The cast all play ancestors of their regular characters in this episode. Duke boys Bo and Luke are dead ringers for their great-grandparents Hank and Joe, Cousin Daisy is Cousin Dixie, and Uncle Jesse is red-haired Jeremiah. Boss Hogg is strikingly similar to ancestor Thaddeus Hogg, as is Rosco to Sheriff Rufus Z. Coltrane. And town mechanic Cooter's ancestor is the town's blacksmith, Dieter Davenport.