Hello Brittany,
I've no idea why I haven't been notified by email about your post here. I visited the forum for a different reason, so I saw your message. On LinkedIn, I don't go by Cristian, it's simply Cris. I sent you a connection request.
Yes, I took both the exams in a row. I've been approved for both of them at the same time (if anyone wonders whether one could have two or more active PMI applications at the same time).
In my opinion, let the PMI worry about you being audited or not. Once you do your homework (being fair in your application), I don't believe you'll have any issues if you'll get audited. I was in a weird situation, as my title is not even "project manager". I was and still am a mechanical engineer doing engineering and project leading. I was not audited, but in my application I wrote exactly who I am. It was all fine after all.
One of the biggest difference, that I've noticed between the two exams, is the difference between theory and real PM world.
For example, if the question is "How's the project doing from the cost point of view?", this is how the question would look like for the two exams:
CAPM: "A project has and earned value of $100 and the total costs to date are $115. What's the CPI?"
PMP: "A project has and earned value of $100 and the total costs to date are $115. What should the project manager do first?"
Did you see the difference? CAPM is just theory, taken from BoK guide, or somewhere else. PMP involves actions, thinking. You're the PM for this project right here, right now. This is the situation of the project, what would you do?
How many questions I've seen that needed an equation? I would say 1%, about two per exam. I didn't pay extra attention to those, since I really liked them. In my opinion, they're easy points. The calculations needed are fairly simple, I think.
Again, please consider my message is all my opinion. Don't take it as scientifically verified. It's just the way I think and this is what I share.