You don't need to include the /id parameter in your command for versions of qRules later than 4.2 - that is now info in the mapping file.
Are you wanting to submit new items to the list each time the rules fire on control where you are storing all the ID's? I think at some point, you may get an error about the number of calc's exceeding IP's limit, since you are changing the field the rule is firing on.
Right now, the Id field is getting set with the Id for the first item submitted. So, the additional submits will update that item, as you've found. I think you should remove the Id from the mapping:
<Mapping>
<FormField IsRichText="false" IsId="true" IsAttachment="false">my:meusCampos/my:Id</FormField>
<SharePointColumn />
</Mapping>
If you keep the Id in the mapping (perhaps you intend to record it someplace else?) you need to clear it prior to the next submit.