2009 Ford F150 Shifting

I recently purchased a new 2009 F150 4X4 with the electronic 6 speed automatic transmission. I noticed from the very begining that it did not seem to shift smoothly. This does not happen all the time but quite often, usually at slow speeds and in the lower qears. There seems to be a shudder as the transmission shifts between gears. A couple of times I felt the transmission breifly shifting, up and down, between gears as if it was unsure of what gear to go into. A couple of times I was going up a steep street that t'ed at the top I would keep up speed to get to the top of the hill but as I let off the throttle to make a turn and then step on the throttle again the transmission made a violent "bang" as it shifted gears.
I took the vehicle into the Ford garage and when I picked it up, they said that they had reset the ASM and the TSM and that the problem was solved. After driving the truck for awhile it seemed as though there might have been a slight improvement, but the problem still existed. The service center asked me to bring it back in and have the service manager go for a ride with me . I did this and the service manager said that he was aware of the problem and that the Ford Motor Company was also aware of it and was working on a solution. He said that it was a computer problem and that they were working on some type of reprogram. Do you know if this is true or not and if not, do you have any sugestions on a solution?