Uhh, you are aware that i go with the exact ratio that Thermal Expansion uses for Signalum right? There is no way I can change that. And yes it uses a crapton of Redstone in the original Recipe, luckily Red Alloy also uses a ton of Redstone, while only counting as one Copper Ingot otherwise, making the Maths easier.
So the Recipe is 3 Copper + 1 Silver + 10 Redstone = 4 Signalum, which yes needs 2.5 Red Alloy to make 4 Signalum. The Recipe is 100% Correct, while your Maths is not, because you go 4 Signalum for 5 Red Alloy even though that would result in 8 Signalum.