Ok so my dads always been a bit friendly with my girlfriends i always figured he was just being nice, you know hugs when they see each other and such and then last summer he called me up and told me he was marring my ex and that they had been seeing each other for yrs. keep in mind that our break-up over laps there relationship's beginning. Now im forced to see her and my dad make out every thanksgiving and holiday (eww) is it normal for me to not approve of this relationship?

It's the perfect revenge. I'm not joking here, that's just an idea.
I say skip out on the holiday meals if you're subjected to that.
Or you could go totally the other way, and at the dinner table, say things like "Hey _____, remember the time when we were having sex and you _____" or "Do you still like it when ______ during sex?" Make your dad feel uncomfortable and awkward.
BTW, this kinda reminds me of Bill and Ted.. 'Hi Missy... I mean Mom"
What your dad and ex did-totally not normal
only 63 percent think its normal for you to hate this? wtf?
love your comments Aussie
another note though, your dad did you a favour showing his true colours and taking her away from you because who knows how much longer you would have wasted your time with her and then finding out she has been with another guy behind your back. try to look at the positives in every situation. she will probably cheat on your dad within the year anyway. im sure you will find a really nice and loyal girl who doesnt have daddy issues who actually wants to be with a guy her own age. best of luck!
The questionnaire is completely normal and to not an issue with his father's actions would be insane.
I am so sorry to hear that something this terrible could happen to anyone.
Wow! This is terrible!