I recently got a new Macbook Pro 13" and upgraded to LR 6, I moved my library without issue but when I import photos into a folder LR creates a duplicate folder outside the original parent folder. I cant move the photos into the correct folder since technically they are already there!?!? The photos on my hardrive are in the correct folder but LR just creates a duplicate folder name ?? Help Please!!
I think you are experiencing the "Capitals/Lowercase" syndrome.
Go to this thread link, then link to the post by Jim Wilde.
and read the 'Correct Answer' at-