Looks to me as though whenever "today's" date has a month later in the year than the birthday and a day-of-month smaller than the day part of the birthday, the algorithm will end up with a negative number of days. The result is mathematically correct, but could be adjusted for readability.

For instance, with DOB=19270424 and Today=19920707, we would expect an age of 65 years and this code gives us that. It then reports that the age is 17 days less than 3 months more than the 65 years. You may want to examine the steps it took and adjust them to show 2 months and 13 days.

----

Edit: Corrected typo from "... more than the 5 years." to "... more than the 65 years."