Hello, Booch85.
No one has posted such a bug yet, and I myself have never observed such a behaviour. The truth is that the editor does modify chest file if you change some of your achievements. But I did it a few times and never have my shared items been damaged or lost. I can only guess your savefile (more specifically the chest file) differs in such a curious way that it happens. Could you upload your character and chest file for me to look at? If it really happens every time you use the editor it should be easy to find and fix the bug. Thanks in advance.
"moral - when you cheat, you cheat only yourself" <- I couldn'a agree more.
By the way I had no idea the word "cheat" had such a negative meaning in english language. At darkmatters.org localogarto and gogoblender (somewhere in this thread:
Link) even stated that the word should not be used, as most of the DarkMatters community uses the editor to create test characters for their moding purposes.
I can say one thing for sure: one can use the editor in any and every way he or she likes. Whether it is creating test characters, fixing mistakenly chosen skills, or simply creating an all powerfull toon, you're free to do so. But remember - the latter way can really rob you of your enjoyment from the game, as Booch85 pointed out. So please, everyone, use the editor responsibly.