Question: There are a lot of form tags with the same name on the same page, when I click submit on one of them what is the expected behavior?

Answer: 
The form which contains that submit button will be submitted.
The `name=` attribute has no special meaning in regards to which form data is going to be submitted. (And it's going to be the form the submit button associates to.)

<http://www.w3.org/TR/html4/interact/forms.html#h-17.3>

It's sort of equivalent to the `id=` attribute, so avoiding identical names would be a good idea regardless.