Transmission Not Go Into Gear problems of the 2011 Volkswagen Golf

Subsequent to slowing down due to traffic, vehicle's dsg transmission affected an unplanned shift to the neutral gear, noticed when driver attempted to increase speed. Transmission was in "manual/tiptronic" mode. Upon noticing transmission was in neutral, driver shifted gear lever into neutral and then into "d" mode (not "manual/tiptronic" mode). Driver remained in the "d" mode for the rest of the 1. 5 hour drive. This is the second time where the vehicle's dsg transmission went into an unplanned shift into neutral gear. Driving conditions were the same as the first time; the first time occurring, Thursday 10/13/2011, driver was in "manual/tiptronic" mode, with vehicle being slowed to under 10 mph, when driver attempted to increase speed, after making a right hand turn, the dsg transmission went into neutral. Rpms rived up 3,000rpm, which alerted the driver that the transmission was not in gear. In both cases, driver had to turn on flashers to insure that there would be no crash from the rear, due to vehicle having no forward power. In both cases, driver shifted the gear shifting lever into neutral, and then into "d" (drive) mode. Driver did not return to the "manual/tiptronic" mode for the rest of the 1. 5 hour drive. Note: first incident was on 10/13/2011 odi # 10432753.