Since you provided a time, I am taking a guess that it's online and the teacher or professor should usually give you a time that officially marks when it's due on January 3rd. If not, you could turn it in on January 3rd anytime, but not after 12:00 a.m. which would make it January 4th. I hope this makes since.
It's a redundant sentence because it does not need to say "over and over" and "and repeated it. Also those two phrases are double negatives. It could also be called a run on sentence.
