jQuery Grid Plugin - jqGrid

Hello,

I'm using TreeGrid 3.4.4, adjacency model, json datatype.

In some cases I have my records doubled after reloadGrid fired. When I look in FireBug - all seems good, it seems that it happens on client side.

I'll try to explain: for exampe, I have only 1 node record in my database. When I just create grid - all looks good, one record appears. Then I click on this record, icon changed to "expanded" and then I do reloadGrid (using pager button or my own button - no matter). After reloadGrid fires - I have already 2 record (1 real and 1 fake). If I do reloadGrid second time - after reloading I have only one record, as needed. But if I click on records (expand or expand and collapse)  and then do reloadGrid again - I will have already 3 records (1 real and 2 fakes)!

In FireBug a see only one records receiving from server. Last 4 fields of this record are  0,"NULL","false","false".

To bypass this situation I tried to do clearGridData() before reloadGrid but got  javascript error "this.parentNode is null".

What am I doing wrong? Any ideas?

Thanks.