Type in the command "Battman" at the autocad command prompt and select the block named pro_def2 (xs_def2 for cross sections) and then make on or more of the attributes visible.
Then zoom in to the bottom left corner of the profile block, you'll see a small block with attributes, this block is how Land knows where your profile is and all of its settings, datum, precision, etc.
If you move your profile and this block at the same time, you will be able to move your profile wherever you want to and it function correctly as if you placed it there in the begining. This also works for Cross Sections by using the xs_def2 block.
Hope this helps!