Hi there,
Your touch screen is malfunctioning. Same thing happened to mine and after a while almost all the touch functions go out of business, and that happens because of the heat or sun rays (according to the manual). Send yours ASAP if it's still under warranty, it costs $200 flat fee for them to change the LCD screen (including labor and shipping).
You can send it to Columbus, OH or Long Beach, CA. The address to get it fixed in Ohio is:
Pioneer Electronics
Attn: Repair
2161 Dividend Drive
Columbus, OH 93228
Include your address, phone number, model, serial number and what's wrong with your unit. Call the Pioneer Product Support line is (800)421-1404 to double check my info if you want. Service is very quick i got mine 4 days after they received it.
I don't think reseting the system will help as your screen is out of calibration but "Press and hold the AV and INFO buttons at the same time AS you reset the unit" according to kerrys914 on another post.
OFF NOTE: if you send your unit and they find nothing wrong, they will charge you $70 fee (it said that on my receipt)
Cheers.