Hmmm, I just click on affiliate setting from the main account page, > analytics > view report > and I see my "dashboard", with the graph of the parameters I've chosen. On the side panel, click visitors, and you should see several statistics on the right, including absolute unique visitors and unique page views, etc. Those statistics are click-able and each statistic yield to a more detailed analysis of the variances by metrics such as date, hub page, etc.
You kind of have to toggle and play with the side panel a little before you see how to interpret some of the information. Beyond that, it's pretty thorough, and more so than I am curious to care for. If this was a business with real revenues and departments, it would be worthwhile, dissecting the trends and looking for patterns; as is, the tool is just overkill.