Is it possible to be registered on 2 lists with both having the same custom fields but different data.
for example, i have list 1 and list 2 and both have the custom field ‘score’. on list 1, a contact has the field score 10 points and on list 2, he has 20 points
A custom field belongs to a contact, and not a list, so you will need to provide custom names for your objects, ie: “list1”, “list2”.
If you use and update custom fields, any new data will overwrite existing data in the field (Create a custom field)
If you’re overloading custom fields and you need to keep a record of previous data points, try custom objects: Custom Objects - Developer Resources. You could then use a custom object with the list name as one of the fields, and maintain a record of previous data. More info here: Create a schema