importing and duplicating repeatedly - URGENT

importing and duplicating repeatedly - URGENT

I'm importing several lists of leads and have started with the shortest one which is about 50 names.  I am assigning the leads to one of three people in rotation using their email address as indicated in the notes.

When I complete the import - the first three records are the only ones that show up and they show up repeatedly for a total of 51 records!!

I need to complete this today as people are waiting - I sent two emails to support but don't know where they went because I can't find them.

Hoping someone out there can give me an answer fairly quickly