module filter first value/filter

-- HikaShop version -- : 2.4.0
-- Joomla version -- : 2.5.28
-- PHP version -- : 5.5.17

Hi
in the BACKEND
-I create a custom field that contain 4 values .
-This custom field has a default value .
-i create 5 product and each contain only one of the 2 values / 4 values
-i create one filter using this custom field
-i create one module filter using this custom field


in the FRONTEND
-The 4 values appear in filter and i select only one each time to test
1) if I don't select the first value and select other item , it is ok
product item appear relatif to the value , filter apply )

2) if i select the first value ( default value) , all the products appear ( no filter apply)
in a way select no item behave like select the item value which is also the default value

regard's

Thank's a lot . the custom field edit mode has no helper icon ... does this is documented ?
TAKE CARE
If i have for one field 0 ( index) , value1 and change it to 2 , value1
Then for each product ; the value value1 ll be change to old / past index values 0 .
so you have to change it index 0 to value1 .
Mass action can be use to update the change in an automatic way ....is very nice in this case
Regard's