You are trying to hide a grid using group box, but it's still showing up.

If you are trying to hide a grid using a group box, but grid still shows up then check the group box on the page. Group box will touching border of the grid. When the border of group box touches the grid, even if you have added the code to hide it, it won't hide it.

Order tab will be correct, i.e. Group box will be on level 0 and Grid will be on level 1., but because of the borders touching the grid won't hide.