New MMM won't update

I finally got it to flash a FW. So I'm running 1.32, but another problem has occurred.

The problem is when I start out slow I get this little burst of speed. It only lasts about 1 second. I tried changing castle settings, swapping radios, different brand of batteries. I tried recalibrating the radio. I made a quick video to show what I mean. Everything else works great. I'm afraid to try a different fw cause I don't want it to brick again.

http://www.youtube.com/watch?v=eyrbKMZ8FlY