Randy -- Based on reading your posts on genetics I would have to defer to you in almost all matters in that rather complex area. You know your stuff!!!
The 3 non-Butters in the clutch are all black backs and are VERY similar to each other in belly markings, head markings/blushing, and overall color -- and DON"T look like a "Normal" that would likely have come from either side of the gene pool -- Butter dad or Cajun mom if mom was not Homozygous for her trait.. They are DARKER(less red tones) than mother -- just like Het Reds are darker than Red Axanthics.
4 of the 5 combos are black backs. The combo that has a more traditional Butter pattern DOES have the color tones of the other combos.
Above is my long-winded attempt at saying we agree. Your are right in that I could just be lucky and hit on all 8!!! Some snakes/projects are not completely understood in one generation -- this is clearly one of them. I'll see what happens with them next season and keep everyone abreast of any developments. Thanks for your input Randy. I value your opinion greatly. Bill