Categories menu is not functioning well.
When I add sub-categories as in screenshot 5 sub-categories, the lower 2 sub-categories are shifting towards right and overlapping the uploaded picture in menu.
We see the problem on the screenshot but can’t enter your web-site without admin access.
The problem exists because first column (Floor lamps) is bigger than second and third. To align all columns properly you need to have all columns with equal height. So try to add one more item (sub category) to “Halo lamps” and “Hanging lamps”.