I had the same problem! Hereis what I did to fix it: The problem was that my financialinstitution (TD Ameritrade in this case) apparently uploaded two weird (placeholder?) transactions into my register for that particular security (in this case amutual fund). The original purchase ofthe security was made in July. Butseveral months later, two unexplained transactions appear in my register:
One was an "Added" transaction and one was "Removed." However, the "Added"transaction has blank fields (zero?) under “Number of shares,” and “Price paid,”and “Total cost.”
The "Remove" transaction has blank/zero “Number ofshares.”
The memo on both reads: "INTERNAL TRANSFER BETWEENACCOUNTS OR ACCOUNT TYPES" so itwas apparently downloaded from TDAmeritrade duringa One-Step Update. Probably someplaceholder for a transaction within TD Ameritrade.
I deleted these two transactions, andthe correct "Day Gain/Loss" numbers appear for every day!