Inadvertent point-and-drag of an item under its child item
If a user intends to point-and-click on an item, but the user inadvertently holds down the mouse button for a bit too long, then IQ may interpret the action as a point-and-drag. If the cursor is in just the right spot (at the center or right part of the item's row, and near the bottom edge of the row) and the mouse is moving in just the right direction (down and to the right), then IQ may determine that the user intends to make the item a child to one of the item's own child items, and this will occur upon release of the mouse button.