Need some help figuring CR

So this is the problem here, especially with the Summit Calc, it gives me the lowest CR equation out of them all. Gives me an 8.3:1, and when using original cast flats, same compressed head gasket, and losing just a hair of material by resurfacing decks and heads, the CR numbers should be at stock, or even a slight bit higher...and that's going based off of factory CR at 9.5:1...so I'm confused..
Really? I'm confused too. Maybe I'm all screwed up, but I've twice input your numbers into the Summit calculator and I get around 9.7:1 compression.