I took a look at it and here are a couple of suggestions.
First go through each segment and hit the "Fill Segment to the End" and then "Calculate" for each segment. The first screen shot is how your mission looked when I opened it.
See how the takeoff segment shoots straight up.
I recalculated and this is how it looks now.
Another issue is Sudz mentioned in a different thread not to use the climb segment due to some know issues. So for know change those segments to cruise. You can still climb by increasing the target altitude in the cruise properties.
One more thing is to increase the speed on your cruise segments for most planes 190 to 220 mph is a good range if you are NOT climbing. If you are climbing then use something similar to the auto-climb speed but, be sure to not go too fast. You want the other planes in the formation to be able to catch up if necessary.
Good Luck and I hope that gets you pointed in the right direction.
Baumer