Strange Investment Income Behavior

Using qkn 06p. Have had some T Notes for several years & have established scheduled transactions for the interest that have worked flawlessly for that time. In Feb. an interest transaction occurred & was transferred to the savings acc't as usual. Looking at end of month reports net worth had jumped almost $500,000 (would that were true). The error was in the Fed Reserve Portfolio & showed that the Feb interest of $100+ resulted in an increase in shares of over 4000. When I checked the transaction in the edit menu it looked as it should -- type income, date, transfer acc't & the amount -- no share value anywhere. Ended up deleting the transaction & reentering & all looks ok. Validated the file w/no errors. This bizarre behavior is worrisome in software that I depend on to such a degree.