I plan a "triangle route" route via 2 aditional Airports (Start at my Home Airport, first landing on Airport A, second Landing on Airport B and third landing on my home Airport).
On my planned route i mark the 3 Aports with "land here". Now i get 3 different routes (1st Route: Home Airport->Airport A, 2nd Route: Airport A->Airport B, 3rd Route: Airport B-> Home Airport).
My question: Can i get a route for the complete way (includind all Airports) as overview?

Many Thanks,
Frank

Since you've set a date and time for all your legs, how could SkyDemon possibly automatically change the dates and times of your other two legs when you change one? We cannot know what your intentions are.