I wonder why Dejaview's current showing of back to back ODAAT episodes only goes up to the fourth season,and then goes back to season one.
Do they not have the next five seasons available for showing?

They did the same thing with MAUDE reruns.Only going up to the fifth season before returning to season one.Dejaview did this to MAUDE for a few years.But eventually MAUDE's next two seasons were added to their back to back episode rounds.

Do you have any episodes from season 3 and 4

I don't get Dejaview but when I used to have cable I remember Prime (now TVTropolis) used to do the same thing with Bewitched, Roseanne, etc.

They would only show about 2 or 3 seasons, then go back to episode 1. They did this for about 3 or 4 cycles before they added another season, usually only one season at a time. It was a very strange practice, which I never saw on any other cable network.