The SmartBear site explains this clearly. If you define 5 rows per iteration, you get 5 rows, but you have to access each of the five by an index. If you don't specify the index, you get the last of the five, which is what I think you're seeing.
E.g.
${DataSource#Country::0} // Index specified
${DataSource#Country} // Index not specified.
Here is the link to SmartBear's site. Link
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