batch numbers help

I'm sure this may seem to be a silly question, but...Can someone please explain why an individual is listed three times on family search with the same film number on all three entries, but two different batch numbers.  Also, two of the entries have reference numbers, but they too, are different.  What exactly do the referernce numbers refer to?  I'm hoping the information/explanation can help tear down a brick wall in my research.
Thanks so much for your help.   Alice