Multiple Camera Folders in the Gallery
I had the exact same issue.  It also caused a related problem.  When I tried to browse the Camera folder on my external sd card, it hangs for about 60 seconds.  So I went to Terminal (if your phone doesn't have this app then download the Terminal Emulator) and did the following (case-sensitive):

cd //storage/extSdCard/DCIM
  mv Camera Recent 

I took me a lot of experimentation to discover the problem and to find a simple fix, but this works just fine for me.  I hope it helps you.