I was a consignor at the sale last Friday, and I agree they did run out of buyers. I think that they have always broken the bulls up in groups like that. It also wouldn't be fair to the Simmental consignors to sell all the Angus bulls first.
The sale committee ranks the bulls based on four EPDs (CED, WW, YW, and Milk) and WDA, based on the bulls weight on the day before the sale. I agree the Gizmo bulls looked as good as any Angus bulls at the sale, and better than some that sold in front of them, IMO.