Scott, I think that the exporting system has me confused.. i'm not sure if I am actually overwriting my old data or not because it doesn't show the differences I've made between each save. Like one folder, I am saving within a folder, within a folder now. I don't think it's applying the changes i've made to the current save..
Every time you export, you have to re-add every custom change back into the layout. It always 100% overwrites everything.