Testing a 5 part mission

I created an Architect Mission that has 5 separate missions.
Part 3 needs work.

Is there a way I can correct this part and test just it without having to do the 2 missions before it?

Thanks.

You can drag the books around to swap the order of the missions. Or does it stack sort them? You can make a complete mess of your mission order, whatever the method. It's handy, when it's not infuriating.

You can also just use the testing interface to automatically complete missions without having to run them - you just talk to the contact, hit complete mission, repeat until you get to the one you want to test. You don't even have to go inside.

One of my missions has 5 different boss characters.
I only want each boss to show up once but for some reason, the mission has three of each boss in it, i.e. 15 bosses instead of 5.

How can I change that?

Thanks.

If I understand the question correctly... I believe your boss's group has to have minions and lieutenants in it. If you want the boss to spawn solo the surrounding enemy group needs to be set to empty.