Default how to avoid duplicate apps on emulated/0 and emulated/legacy

after I "root" my samsung note 8.0 GT N5100, there is a folder on my sdcard "emulated / 0 and emulated / legacy" folder that basically both the same, but the apps that I installed was found on the second folder thus diminishing the capacity of the sdcard. Can you help me to avoid doubling the files on the sdcard? sdcard0 and folder names can be changed in the original (sdcard)? thank you.