Cruise Control problems of the 2015 Mazda CX-5

I have experienced intermittent problems with the steering wheel buttons, especially with regard to the cruise control (cc). Sometimes, the buttons appear to change functions with each other. Here is an example: 1. I am driving along on the highway, and I turn on cc ¿ the dash indicator appears in yellow. 2. I set the cc to my current speed, the dash indicator changes to green, and my speed is regulated. 3. I decide to reduce speed, so I press the minus (-) button once. 4. My speed increases by about one mile per hour. 5. I press minus (-) again, and I speed up another mile per hour. 6. I press plus (+), and I slow down one mile per hour. 7. I press cancel, and nothing happens ¿ the cc indicator on the dash stays green, and my speed holds at the current value. ¿it is possible that cancel reduces my speed by one mile per hour, but I usually don¿t wait long enough to find out, because I am trying to cancel! 8. I press off, and the cc cancels. It is still on, but the dash indicator turns yellow, and my speed is no longer regulated (I am coasting). 9. I press off several times, and nothing changes ¿ the dash indicator is yellow. 10. No matter which button I press, I cannot shut of cc. ¿the dash indicator will change from green to yellow and back, but cc never shuts off. 11. Sometimes, I can run my thumb around the buttons in a circle, and cc starts working again, but this does not always work. 12. If I shut off the car, cc will work for a while. 13. If cc stops working as described, and I am on a long trip, it will sometimes start working properly again after some long period of time (30 minutes or so). I have experienced similar problems with the radio controls. I occasionally press the volume control and the station changes. Typically, this only happens once, and when I change the station back to where it was, I am able to adjust the volume again.