Yes very relieved, sounds like you're almost there, so keep at it and you'll eventually get done!
I'm not sure what they will question to be honest. If they do queston you, then just write your explanation and tell them you can get written confirmation from those people if they require so. I think if you just have everything written and displayed in detail then it goes a little smoother.
One thing to make sure is that the income you told them verbally matches what your paystubs say. If not, then you will run into some problems/delays.
In regard to the counsellor, I think you can go over the numbers with them. I talked about mine with my counsellor. My final number, i still think they calculated it wrong, it's a bit higher than what I expected cuz i figured out how they got the modified payment, but I didn't want to make it an issue and delay things further, so I just went with what they gave me as it is much better than my original payment and just wanted to be done with it.
Good luck, just be persistent...