I use the free DropBox version to track hobby purchases. I update an Excel file on my PC to indicate the items I have purchased and have DropBox installed on my iPhone and my iPad. I seem to have always had sync issues and have ended up buying items, basing purchase decisions on the DropBox file found on my iPhone, that I already had and had indicated on my PC file. I have two questions before doing away with DropBox:
1- why doesn't my iPhone file sync with the file on my computer;
2- why does the desktop DropBox app eventually change into a simple folder that looks like this:

My thanks in advance to anyone who can enlighten me.