Data Import Template for Contacts - Displays more fields than just the ones in the main form

Hi there,
I'm having an issue regarding the Data Import Template for Contacts. When I download the file and then open it in Excel, it displays more fields than the ones that are published in the main form.

What I read so far, the "behaviour" for Data Import Templates is that they show the fields that are displayed and published in the main form of the entity, right?

Is there any one who had the same issue?

Is there anyone who can help me out figuring out what's happening in my CRM?

(Dynamics CRM 2013 SP1 (3.1.2.112))