Agree with what you said but I found someone else with the same board if it processes the same sticks and also had the same problem as ours ...Ah ok, I see what you are saying. So you have the exact same 32GB kit as me? It is listed on the Gigabyte motherboard compatibility sheet. Bearing in mind I have 1 board that will run either of the two sets of memory that I have with the i7 or the i9, and that it is listed as compatible by Gigabyte, and also that it is one of the most popular memory kits I would tend to think that it should work.
I would also point out that people don't tend to publicise what they have put together unless they are having a problem with it.
So I tend to think this is a compatibility issue with the CPU and not a motherboard
As for the amount of sticks? Yes
2X16GB = 32GB