Bug found in Nextgrid Ver. 6.0.13.
Startpoint is an empty grid.
Result after first time execution of
nextgrid61.InsertRow(0,1);
Nextgrid61.Cell[0,0].AsString:=inttostr(Counter)+'. execution';
is exactly one correct row within grid.
The next execution result are three rows,
the new row and two times the row i am
inserted before.
Third execution - new row, two times first old
row and two times second old row = five rows.
And so on.
See the picture.