Door Latch problems of the 2002 Dodge Dakota

The rear door locks on the 2002 ram 1500 will not unlock without hitting the button more than 8-9 times. This was frustrating because I paid thousands of dollars for this truck, and I would expect things like this to work on first try.

Right rear door lock made buzzing noise when locked, which is startling when auto-lock engages on acceleration. Dealer repaired, and as I left parking lot, it began again, and was repaired. About 3 weeks later, left rear lock did the samething and was repaired. Of course, the dealer did not believe me until I took time off of work to take it to them. I asked them to replace all remaining motors, but they refused since it was still in warranty and not broken yet. Two months later, rear driver side automatic winow did not work.