You must be pleased, Harry. The light must have changed a bit causing the double grouping - it happens. The right hand group is very good, while the fliers hurt the left hand group of 2 which is same elevation as the right group.
Be sure to use the same pressure & the same method each time you seat the ball onto the powder. Variation there will usually give elevation problems and vertical fliers, up and down. Well done buddy, you're on the right track.