Maybe I'm saying something stupid, but I believe you just changed the itemdesc, without actually reformatting the gump...

Corpses are a special class in escript programming. I remember something from previous forum about this issue, and i believe answer was you'll have to destroy and recreate corpse (with all the props and cprops) for each location you move it. And, definitely, wont look like a smooth movement :\

in pol/regions there is a cfg file that determines areas subject to guard protection. look what you screwed, there or in any other part referring to that file.