When I started playing with the store I did a mix of no description and worthless deceptions thinking I would go back later and fill those in. Now when I go back and make changes and save them the entire description will go away on the front end or not change and sometimes actually change. Also I have noticed trying to change the image for categories will do the same thing.
The back-end shows the description and the images but the front end just removes the images or the description if you make a change to them.
The only fix I have found so far is to create a new category all over again with what I want in it and move my products into the new one.
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