Retrying a failed mission: this needs some work I think.
The first mission to go over 5,000m. Easy, build a simple rocket and go to launch. Once on the launch pad I am told to land on the island - back to VAB to change the rocket so that it can steer. Success, 6,000 pts.
Next mission is to take a temp reading over 48,000m, so I build a rocket to go straight up to 48k. Then once on the launch pad I get some new information that I need to follow a certain path. I restart the mission and find it puts me back to the very beginning where I need to go over 5k and land on the island. All progress is lost.
So now I have learned to make a save after each success. It is convoluted but it works.