Forgotten Construction Set major bug

[adisknight]

Whenever I edit and item on the forgotten construction set, it duplicates the editted itens, sometimes causing crashes.
I edited how much itens the well, farm, rum making buildings can carry and produce and now it says the farm requires 2 water slots to function, the grain silo now asks two wheatstraws to produce. Resuming, the requirements have duplicated.
Whenever I change NPC's equipments they behave wierldy in-game as some get no armor or weapons and when I try to open the mod file on the construction set it causes a bug that sometimes cannot be continued and when it continues I see the changes I made on the itens make them get duplicated.
Never experienced that on the construction set, It always behaved properly.
This happens now since 0.4 update.

EDIT:>
Better explaining the problem: whichever item I modify on the construction set gets a duplicate ID when I save it and some itens crash the game and other double its requirements, as seen on water, sheatstraw, grain, hemp, stone and such itens.