Create multiple entries in model through nested form via simple_form

When a user creates a vacancy I want them to be able to save either 1 range of dates or multiple separate dates.

So I have 2 models, Vacancy and Vacancyschedule.

Vacancyschedule includes vacancy_id start_date end_date start_hour end_hour (to save a range) and when it is multiple seperate dates, I just want to leave the end_date empty and have multiple entries and combine them through my vacancy_id.

This is my code in my view:

... other code to ask for vacancy params, nothing special, nothing broken ...

#Code to create entry in vacancyschedule
    <%= t.simple_fields_for :vacancyschedule do |p| %>
       <%= p.input :start_date, :as => :date_picker, :label => false%>
       <%= p.input :start_hour, as: :time, default: Time.parse('09:00')%>
       <%= p.input :end_hour, as: :time, default: Time.parse('17:00')%>
    <% end %>

And then I have some javascript that adds another exact copy one of those blocks when a user wants to add a second seperate date.

Now for my question:

The format in which they are passed is very strange. As you can see I ask for :start_date, :start_hour and :end hour and this is what I get:

{"name"=>"", "street"=>"", "description"=>"", "skill_id"=>"",
"jobtype_id"=>"", "wage"=>"", "vacancyschedule"=>
{"start_date"=>"27/10/15", "end_date"=>"", "start_hour"=>"", 
"end_hour"=>"", "start_hour(1i)"=>"2015", "start_hour(2i)"=>"10",
 "start_hour(3i)"=>"26", "start_hour(4i)"=>"21", 
"start_hour(5i)"=>"00", "end_hour(1i)"=>"2015", "end_hour(2i)"=>"10",
 "end_hour(3i)"=>"26", "end_hour(4i)"=>"17", "end_hour(5i)"=>"00"}, 
"vacancyscheduele"=>{"start_date"=>"", "start_hour(1i)"=>"2015", 
"start_hour(2i)"=>"10", "start_hour(3i)"=>"26", "start_hour(4i)"=>"09",
"start_hour(5i)"=>"00", "end_hour(1i)"=>"2015", "end_hour(2i)"=>"10",
"end_hour(3i)"=>"26", "end_hour(4i)"=>"17", "end_hour(5i)"=>"00"}, 
"tag_list"=>""}, "radio"=>"on", "commit"=>"Create Vacancy", 
"controller"=>"vacancies", "action"=>"create", "employer_id"=>"2"}

From what I can see is that they are passed in very different variables and incomplete (not all dates are passed).

Does anyone have any experience with this issue? How would I either grab these elements or how do I prevent them from being pushed in that format?