When I grab a line item in a BOM and drag it to a new location it will only let me place it in certain locations

showing either a red "Not" sysmbol or the right angle arrow to where it can be placed.

I need to reorder this indented BOM and some items no matter where I drag it to wont let me drop

it in the order I need to have it in.

Has anyone foound a work around to this problem?

Besides manual typing?

Thanks