Odd 6L80E Behavoir

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I was doing some data logging at the track this weekend and I have some odd behavior that I can't seem to put my finger on. As you will see the run starts at Frame 737 and at frame 745 the car pulls 22.5 of timing ramps it back in and then pulls 24.5 degrees at frame 753. At the shifts I see the throttle position drop 40-50% and the timing drops to -2.5*. I expect the timing to dip due to the upshift torque management, but have not seen it drop throttle position before. Any ideas?

W~