Django - Save forms in the same data table

I'm having problem in saving selected choices in the same row of data table for each participant).

I have 2 forms. The first form is for some data and a multiple-choice question. The second form is another multiple-choice question. It also means I have 2 pages, after submit answers for page 1, it will redirect to page 2 for question 2.

When I try to be a participant and choose answers, the selected choices are saved in different data table. Pictures and code are displayed below.

forms.py

from django import forms
from .models import Survey

class SurveyForm(forms.ModelForm):
    BAT='Batman'
    SUPER='Superman'
    IRON='Ironman'
    WHATMOVIE1 = [
    (BAT, 'Batman'),
    (SUPER, 'Superman'),
    (IRON, 'Ironman'),
    ]
    movie_1 = forms.ChoiceField(choices=WHATMOVIE1, widget=forms.RadioSelect())
    class Meta:
        model = Survey
        fields = ["location", "age", 
        "marital_status", "education", 'movie_1']

class SurForm(forms.ModelForm):
    APP='Apple'
    BAN='Banana'
    LEM='Lemon'
    WHATMOVIE2 = [
    (APP, 'Apple'),
    (BAN, 'Banana'),
    (LEM, 'Lemon'),
    ]
    movie_2 = forms.ChoiceField(choices=WHATMOVIE2, widget=forms.RadioSelect())
    class Meta:
        model = Survey
        fields = [ 'movie_2']

views.py

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.core.urlresolvers import reverse
from .forms import SurveyForm, SurForm

def homepage(request):
    if request.method == 'POST':
        title = "Questionnaire"
        form = SurveyForm(request.POST or None)
        if form.is_valid():
            instance = form.save(commit=False)
            instance.save()
            return HttpResponseRedirect(reverse('nextpage'))
    else:
        form = SurveyForm()
    return render(request, "homepage.html", {"form": form})

def nextpage(request):
    title = "Next page"
    form = SurForm(request.POST or None)
    if form.is_valid():
        instance = form.save(commit=False)
        instance.save()
    context = {
        "form": form,
    }
    return render(request, "nextpage.html", context)

admin.py

from django.contrib import admin
from .forms import SurveyForm, SurForm
from .models import Survey, Sur

    class SurAdmin(admin.ModelAdmin):
        form = SurForm

    class SurveyAdmin(admin.ModelAdmin):
        list_display = ["location", "age", 
        "marital_status", "education", 
        "movie_1"]
        form = SurveyForm


    admin.site.register(Survey, SurveyAdmin)
    admin.site.register(Sur, SurAdmin)

What should I do to save all selected answers in the same row for each participant?