Hello,
As you can see highlighted in red box in the first jpeg attached, I have 4 "Anaran'ny VOI" while it should be just one column. The reason is because in my list of choices, I have 4 different Faritany (first red box in the 2nd picture attached). I wanted to limit the list of choice that appear for the end user so I have used the choice_filter (in the red box of the 3rd picture) but it didn't work, so I would need your advice because I am stuck there. Please note that each VOI is related to one Faritra and I have put region as title of the Faritra each VOI is affiliated to (as shown on picture 2, red box 2 and 3).
Thank you 

