Norton Zone creates duplicate empty folders

I have a folder containing many word docs and subfolders, and put it in Norton Zone. As Zone transfers the files, it creates empty folders in the Norton Zone root folder, each with the name of one of the subfolders in my original structure, sometimes appended with "_1" or "_1_1".

 

That is, I put the folder "WP" in Norton Zone, and one of its nested subfolders is "WP\Active\Blog Posts". Now, next to the WP folder, I see a "Blog Posts" folder, a "Blog Posts_1" folder, and a "Blog Posts_1_1" folder, all empty. And two of them have a little green checkmark on the icon, while the actual "WP\Active\Blog Posts" folder has the blue "<<" on the icon. What does this mean?