GOOD NEWS!!!!!
A person on another site gave me the answer, and it WORKED!!!!
Here is the answer:
2015's should all have the correct seat memory software, the "fix" only applies to 2014's. None of the C7's or any other GM product uses the older FOB assignment logic. FOB 1 is ALWAYS the first FOB married to the car, FOB 2 is the second, etc. and there is not external marking.
It's really easy to figure out which one is which, just set the seat recall to "on door open", set each memory number to a unique position then press the unlock key on a FOB and observe which of the 2 positions it went to. Then mark the FOB's 1 and 2 for future reference.
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As the FOBs are no longer marked (great decision) the owner has to do a process which tells him/her which FOBs are which. Turns out I chose the wrong FOB to use, as it was really the number 2 FOB.
Seems like the factory should identify which FOB they initially used to start the car, that FOB would automatically be seen by the car as number 1.