Mistake

This was a pretty good movie but there was a mistake. Near the end right after Mr.D fades out of the pic it shows the Warner house and says 3 years later at the bottom. Now this lines up with the ce one year old kid. But supposedly this is Dylans junior year which means it should be the following year. And the fact no other names preceed Mr.D's name on the teacher of the year award trophy. Am I right or just retarded. Be kind.