[Koha] Importing books creates multiple items

I'm importing a csv file of books into Koha, using MarcEdit. The fields are: author, title, publisher, year, item type, barcode, and shelf location. It looks like I'm getting two items for every line in the file. One item contains the correct barcode, and the other item contains the correct shelf location. Anyone have any ideas where I'm going wrong? And this might be a related question: what is the difference between an authority record and a bib record? Thanks -- Tim -- View this message in context: http://koha.1045719.n5.nabble.com/Importing-books-creates-multiple-items-tp5... Sent from the Koha-general mailing list archive at Nabble.com.