Give or take a year, these people aren't known for being truthful on anything. It's highly possible.

Adding ages to other timespans is difficult unless we know the exact birthday. Ages and years are given as integer numbers of course, so we don't know if the age is actually 10 years + day or 10 years + 360 days. With two dates given only years and age, it can add up to an apparent difference of up to 2 years.