As mentioned above, you need to turn one flap servo around, then remove the servo horn and replace it in the correct position. Just put the servos in in the same position, facing the same direction, so the horn(part that moves)moves the same direction on both of them. Put them so both output shafts with horn face the left wingtip, not one facing left and one right. If you have anyone nearby to help, that would be great. If not, prepare to repair.