fstab ignores username configuration

I'm struggling to find a solution to this random issue.I have the following configuration:

//192.168.1.39/MediaCenter /media/NAS/MediaCenter cifs username=USER1,password=PASSWORD1,uid=1000//192.168.1.39/home/Photos /media/NAS/HomePhotosUSER1 cifs ro,_netdev,noserverino,username=USER1,password=PASSWORD1,uid=1000//192.168.1.39/home/Photos /media/NAS/HomePhotosUSER2 cifs ro,_netdev,noserverino,username=USER2,password=PASSWORD2,uid=1000//192.168.1.39/home/Photos /media/NAS/HomePhotosUSER3 cifs ro,_netdev,noserverino,username=USER3,password=PASSWORD3,uid=1000

This is to map 4 folders from a Synology NAS to my Ubuntu computer.The first line has worked like this for probably 3 years without any issues.

For the other 3, the folder for the USER1 is sometimes replaced with the USER2 or USER3 content. It's as if it is grabbing the configuration for users 2 or 3 and applying it to the user folder.

Currently, the USER3 photos are shown in the folder for the USER1; one month ago, I got the same issue but with pictures from USER2.Last time i deleted the folders restarted and remounted and solved the issue but now is showing again.

example showing the same pictures in both folders