We are not perfect; but remember when you point one finger. Two points back at you.
Is every name re-copied from the original page or just so many names. Don't count on it being a misprint unless you know for sure.
You have to look at the page at the very top and read from left to right as you look at it. (1.) Make sure it is the same state,county, city, same census date and year,and Enumerator. (2.) In the top right hand Corner as you look at it. That it is the same Page No., Sheet no, Enumerator District and Enumeration Date. You especialy want to look at the sheet No. and page no.. (3.) If all that is the same. Then it is a duplicate. (4.)If any of those are different. Then this is not a duplicate.
I am pretty sure of that. Especially the page numbers. If there is another Enumerator also that could mean he was the one who made the duplication. If it is a duplication.