When I download, most of the wallpapers I have chosen are saved to the specific folder I have created/designated...let's say "Sun and Sky"...which I can access at any time I choose since I created the folder and know it's location on my computer. However, there are a few of the wallpapers that are "saved as" to (what appears to be) the exact same folder name and pathway, but seems to be a hidden or completely different and non-accessible folder to me for all practical purposes. Is it perhaps a copyrighted folder, or some such issue? And...how do I access it by intentional purpose? For all practical purposes there would appear to be 2 different folders with the exact same name and pathway, one is hidden, one is not. What's the deal here?

if you know the file name of the downloaded wallpaper, do a search for that name
on your computer... and adjust the settings of the search to included hidden files and
folders. you should then be able to open the containing folder & get to them that way.
also, most web browsers open a separate window for downloads... a download manager. in the web browser's download manager, you can right click on the wallpaper and there should be an option to open the containing folder.
once you find the missing wallpapers, you can then copy them to your desired location.

toodles,
harmless