I am having a problem with trying to remove ships in a saved game

My problem is that I wanted to take a large sized ship and redo it as a huge ship without losing the design or the name at all, so I delete the large design in both ships and templates, but this does not seem to work. So far I have gone so far as to delete all ship files with the name "Imperial War Hawk" from all versions I have of GC2 but to no avail.

The main issue itself is that when I delete them within the saved game, I delete the large design and remake it as a huge ship with the same name aand design as I want it. But after a couple of turns or so, because the name of both the large and huge ships are the same, it somehow goes back to using the specs for the large sized ship and ignores the huge design altogether.

Like I said above any ship and template files with that ship's name have been deleted, but am I missing some files that could be saved elsewhere, and if that's not what is causing this, then could it be that the designs are being read from the saved game and thus, not able to be removed?