You don't see it because you added a Product and no Categories ...
Categories hold Products or Categories but never both ...
The buttons appear and disappear based on if there is a Product or Category in the Category ...
You have Products in Category 0 which is the top level ... so you never see the New Category ...
It also sounds like you may not have v1.3.0.2 running ...
I thought I put in a nice Stop! Don't do that! warning in the Top Level Category so you would not get into this situation ...![]()
What version of Zen Cart are you running?



