In my gallery I literally have 9 folders for all my pictures: (3) Camera, Screenshots, 100MEDIA, (3) Downloads and wallpapers. Can anyone help me fix this somehow ?
That's the way Android does things. You can use a file manager (Astro, ES File Explorer) to move files from one folder to another and consolidate them that way.
Personally, if I've taken a screenshot, for example, I'm glad I don't have to wade through all my other images to find it. I don't really know, but suspect, that the different download folders were created by different apps. I'm not sure why there are multiple camera folders, though.