That's weird. From my side, all of the things that I have edited remained in my town, EXCEPT ONE THING : I have edited a Golden fence for one of my players houses (who didn't already gather the complete score of the HHA to have a golden fence). After saving in the editor, the golden fence appears in the house and remains during all of the day, however, the fence goes back to the previous model on the next day. This is the only problem that I have noticed until now, all of the other modifications remained.
What kind of editing did you make ?