Using TreeGrid as ListGrid with dataFetchMode: "paged"

Hello,

I'm using SmartClient_v91p_2014-09-30_PowerEdition and I when I set dataFetchMode: "paged" and loadDataOnDemand: false on TreeGrid that doesn't have any parents and call fetchData I get 5 different calls to the server. When I set dataFetchMode to be basic I get only 1 call.

The first call contain a startRow and endRow properties but the other calls doesn't.

Any thoughts?