Need Help with T43 6L90 OEM Shift

[gaduser]

Included are two OEM tables from my 2011 CTS-V: the Part Throttle Shift and the Normal TCC tables.

I constructed the third table in trying to understand how the system works.

"Lock - Upshift" contains subtracted speeds. For example, at 0 Throttle, 4th locks at 37 MPH, after the 3-4 shift at 27 MPH. The subtracted MPH is +10 indicating that Lock occurs 10 MPH above the Upshift. The positive 10 makes sense.
However, at 50% Throttle, 4th locks at 37 MPH, after the 3-4 shift at 68 MPH. The subtracted MPH is -31 MPH. That seems to show that Lock occurs at a much lower speed than the Upshift, clearly not possible.

Similar logic applies to the Release - Downshift calculated results.

It seems to me that the transmission and/or TCM may Release the Converter on every shift, be it up or down. In that case, many of the table entries may have no effect because they are below an upshift MPH or below a downshift MPH. If that is the case, I wonder why those are in the table at all.

I will appreciate any and all help toward my understanding of this. Actually, I wonder if I made a stupid error in my reasoning. If so, let me know.

I could experiment with the car to learn more. However, that seems like a really bad idea because I don't believe that I know what I am doing, yet.

Thanks much!