Why do I see differnce in Equity, Holding and Volume values if I add the following:

self.equity.SetDataNormalizationMode(DataNormalizationMode.Raw)

I bought 100 shares of SPY on the first tick and held until the end (5 days) and I see the difference in the reported values. I can see how these values are calculated in Normalized mode but can't figure out how they are calculated in Raw mode,