Running Simulations in PSO

I am new to IFS and the company I work for, I have been asked to run simulations on data using the Analysis tab in PSO.  Is this the correct way? or is there a better way?

These are the steps I am told to follow:
1) Pull snapshot from the archive in production
2) Loan snapshot into training environment to get the baseline file using Data Viewer
3) Using the Analysis tab, download the Group By extracts 
4) Change the baseline file for the simulation (ie. change base values)
5) Load simulation data into the training environment  using Data Viewer 
6) Using the Analysis tab, download the Group By extracts 
7) Compare the baseline and simulation Group By extracts manually

I am having a hard time understanding the changes since all I get is summarized data, I can’t dive into the data and see why things changed since all I get a summaries. 

So here are some questions I have but can’t seem to get answers too:

1) I re-ran the simulation with the same simulation data a few days later, compared it to the original simulation extract, there was a resource that had no activities scheduled to them, but now they have 8. How does this happen and why wouldn’t this resource have any activities the first time?

2) Should the All row in Group By Resource and Group By Resource Region be the same? They are not for me all the time

3) Should the All row in Group By Activity Type and Group By Activity Region be the same? They are not for me all the time