BIG Timeline Mistake

Ok, this was hard to explain in person, so this will probably be the same. Austin finishes has his spy school graduation in 1958, when he looks to be not much older than 20yrs old, if that. In the first movie Dr. Evil flees to space in the Big Boy in 1967 (or 1969, i can't remember)which would make him somewhere between 30 and 40 years old. Austin is frozen for thirty years, until 1997 (when the first movie came out), and 5 yrs later goldmember is released in 2002. This would mean austin can't be more than 50 in 2002, right? If austin was never frozen, he would be no less than 60 years old. That being said, austins dad was never frozen (he mocks austin for being frozen) and he is abducted in 2002 by goldmember from his yacht. in 2002, austins dad appears to be at the very oldest 70 yrs old. this would mean that in 2002 austin and his dad would be around the same age had austin not been frozen. Hopefully that came out clear because it has been bugging me!!