2009 Honda Civic drivetrain & axles problems

My 2009 (automatic) honda civic ex slipped into neutral four during the night. For the first three times, the driver would allow the rpm's to drop causing us to sit in traffic for an undefined period of time before returning the car to the drive position. On the fourth time this happened, driver and I were in a large parking lot making a right turn with a building about a football field away. About halfway through the turn, the car was placed back into drive from neutral and it began to drive itself.

While driving a chatter started under the hood. Drove it to our mechanic (1 to 2 miles away) and he said the steel bolt broke that holds the belt tensioner to the aluminum engine. Had it fixed and the same thing happened on august 8, 2013 while driving. This time the car shut down completely and I was able to safely stop it and call for a tow. Took it to the mechanic again and he said upon talking to honda dealers, this happened in 2006 and 2007 and there was a recall for this problem.