Hi!
First of all thank you for your job on MPE. I used it quite every day and I
am very satisfied.
I have the same problem of double identic photos after each synchronization.
My phone is a HuaWei Honor 5 C, running Android 7.0, EMUI 5.0. I use 1.8.8 version of MPE, Windows 7 professional edition.
I noticed one little thing that, maybe, could help to solve the problem (what I couldn't do by myself, but believe me, I tried!)

: when I'm in the MPE interface and I look in my smartphone folders, I have exactly the same folders both in my internal storage and in my external memory (the SD card, I guess). Including of course the DCIM folder containing all my photos.
Could it be a reason why I have systematically obtain 2 copies of each photo after a synchronization ? I don't know, but surely (or maybe) you will.
Two more important informations :
- I set by default my phone to save all my files on my SD card.
- I checked on my phone : all the photos are ONLY in my SD card. No one is in the internal storage.
Big mystery !
Anyway, I would be very grateful for all the help you could bring to me on this matter or issue.
Thank you and best regards.