Use My Files. Go to DCIM/Camera (if it's the wrong one, back up one and go to the other one). Long-press a file you want to delete. Then tapping other files will add checkmarks to them too. When you've gotten them all, there should be a trash can at the top - tap it, and all the checked files should get deleted. (It sounds as if you have a filesystem problem, though. You may have to back everything up, then reflash the firmware, then restore everything.)
As for duplicate album names - the album name is the name of the folder the pictures are in, so if you have 2 folders, one at DCIM/Camera and one at DCIM/vacations/Camera, they'll both show as being in Camera albums. It's up to you to keep track of things like that, so you don't duplicate names.
07-15-2018 02:22 PM