Moving objects to new layer in Illustrator on iPad

Hi there!

It seems like when I want to drag a path object to be on its own new layer in the layers panel, sometimes it works, but most of the time I will get an error message saying "can't move non layer object to the top". What exactly does this error mean?

I do seem to be able to create a new empty layer and drage my shape into it, but it is much more laborious. I also still haven't figured out why sometimes just simply dragging a shape between existing layers to make its own layer works fine, but when I try to do it again another time it gives me the error!

{Renamed by MOD}