When I run the Portfolio performance report, only Transfers-In wind up factored into the cost of each investment; the reinvested dividends do not. The same ting happens in the Open Lots report (it shows lots for each Transfer-In, but not for the reinvested dividend purchases). I don't really want to use the Open Lots report for making investment-level decisions because it's too unwieldy for that, but I wanted to verify that what seems to be happening is that the dividend reinvestment is not being added to the cost basis.
Why is this and what can I do about it? Am I perhaps missing a toggle switch somewhere? These are, after all, cost bases that figure into the capital gains consequences of selling an investment, and after many years of reinvested dividends, the discrepancy gets very substantial.