This iPhone/iPod is synced with another computer. Erase and sync with computers library?

Question

Hello Apple Users,
I've hated this problem ever since my mom got an iPod and then the rest of my family started getting Apple products. As of now, I have an iPhone 5C (7.0.4 going to 7.0.6 soon, Green), my Mom: iPhone 5C (7.0.4 soon 7.0.6), my Dad: iPhone 5C (7.0.4 soon 7.0.6). I've had an iPod for about 3 years now and still using it to multitask. I was connected to my parents' Apple ID until I created my own.
Once I created my own, got my own computer and the stuff like that, I decided to sync my iPhone 5C. Yet, when I try I get this:
This only happens with the following when trying to sync:
•Tones (Any Tone)
•Music (Any Selection)
•Movies (Any Selection)
•TV Shows (Any Selection)
I really need to fix this. It's ridiculous. What should happen is:
Once synced, it creates a folder (Preferably either in Program Files/Program Files (x86), or AppData somewhere) named "Synced iDevices". Click it, it'll have your iDevices Model Number or something, or your iDevice (iPod #G/iPhone #G etc.). And It's basically a "Library" as iTunes calls it. If you delete it, then it's considered "un-synced" and you can re-sync again if you want. This could also be a feature in iTunes.
Feedback is always appreciated! Thanks for reading!
Regards, OptimalVorteX
P.S.: I won't be on the Forums after this because im going to a hockey game! I'll try to get on my phone if it isn't dead though!

Answer 1

Yeah dude screw apple. I hate apple. All apple wants to do is control the world.
Im stuck in a loop:
1. I Click "Back Up Now"
2. It says, "Authorize or else, 12 apps and their data will be deleted from this iPhone".
3. I click "Authorize" (keep in mind, It's already authorized)
4. Then, it makes me authorize my parents Apple ID/Computer (which is also authorized).
5. I type in the password and click "Authorize".
6. It says, "5/5 computers are already Authorized with this Apple ID".
Well lets see: We have 3 computers, my brother, my parents, and my own. My brother doesn't even have an Apple ID, iTunes, or any iDevice. So, we're down to 2 computers. My parents have their own Apple ID. I have my own Apple ID. Now remember it made my authorize my parents Apple ID/Computer? Well why? And if the iDevices count, that's 2 iDevices, and a Computer (my parents). That's 3. My Computer = 4 (BUT ITS AUTHORIZED WITH MY DANG APPLE ID). So really, it's actually 3.
Sorry for the horrible description, guys. If you want it more simple, then I can do that. In the meantime, thanks for helping me out, and I'll be writing Apple a 3 star review.
Regards, Vortex.