When using Manage Multiple Fields feature, all conditions connected to the selected fields get copied, while not all conditions are needed

a lot of fields with condition within the same form, but when you duplicate multiple fields with conditions, you´ll have more conditions than y

Yes, that is correct and that is the expected result Fabio.

Basically each time you state that you want to copy the fields with their conditions included, it means that all conditions that are connected to that single or multiple fields will be cloned as well.

For this reason I would suggest to not copy it with the conditions, but to create them manually, or (I would not recommend doing it this way) you can clone them with their conditions and then go into Conditions Wizard and remove the ones that are not needed.