Problem with Argus' Case Studies for its Developer program

Hello there, I am new here and I am preparing for Argus' certification program for Argus Developer. I bought the elearning program from Arugs, which came with a Case Study manual. I believe not many people wanting to get certified for the Developer program, but can people recreate the model with easy success with their relevant program case studies (likely to be DCF?) Out of 10 case studies in the manual, I encountering the following difference between my calculation mode and the model answer:

Having the right profit amount, but not the right profit distribution between sources - in Wheaton Lake Project
Differences in the loan interest amount: in Paradise Esplanade; Asgard Resort

Obviously I have problem with the structured finance module. To those who have done the case studies, if someone can point out where I might miss, or better if someone can send me the project files where s/he still keeps after certification, any help will be appreciated!