In the episode where Del and Rodney's father returns, it is stated that Rodney was 5 years old in 1965 when the father walked out, yet when Rodeny married Cassandra, you see on the marriage certificate that he was 26 years old in 1989. Shouldn't he have been 30 years old in 1989 if he was 5 years old in 1965? He would have been born in 1960. Somone didnt do their maths!