In June, I flew DL 106, 107 LA_JFK_FRA. I received appropriate credit plus the transcon bonus. About a week ago, I received an additional transcon bonus. Yesterday, everything was deducted from my account- the flights and the bonuses. When I called today, I was told the computer was acting up, but they are keeping a list of people who call. When the computer glitch is fixed they will reinstate the flights.