Retail Sales Question

I have a question regarding the attached model. When I first created the dataset, I altered the sales for “retail.” As a check, I re-ran them by creating a new event -- “Retail (David Test).” To my consternation, this resulted in different results (albeit the difference was small – 58 direct employees vs. 57). Is this a glitch particular to my appliance, or do I have to completely regenerate an event to get the proper results? Also, can you verify that you are getting the same results when you run this event?