How can I properly receive these Array of Inputs on asp.net?
These are not arrays of inputs. HTML doesn't have a concept of arrays.
These are simply groups of inputs with the same name.
What are you trying to achieve? Why are you not using server side controls?
Update:
You can access the Request.Forms
collection - it will hold the posted form elements.
Alternatively, use server side controls - you will be able to access these by ID.