On 9/12/2017 12:42 PM, ruby wrote:
Very likely what's happening is that the index is changing between the
query for the first page and the query for the second page. This change
puts some new items on that first page, pushing some of the items that
used to be on page 1 to page 2.
The only absolutely certain way to prevent this would be to never make
any changes to the index.