Jump Drive, Cloak and probably Hyperspace Scanner takes twice its mounted size during unmounting process, AFAIK the best way to unmount it, is by selling the cloak to POB, but before that ask POB admins to set its price to 1 SC
I'm guessing what is happened is that the cloak fit in my hold unmounted but when mounted, it did not. Basically, it shouldn't have installed in the first place.
I carried it as cargo--loaded and unloaded--twice with no issues. It was the mounting (to keep from losing it) that glitched it up.
I have a faction that may assist me--hopefully tonight.