No, I’m saying that looking at your flow curves the 50 took a bigger dip than the 45.
I forget the valve size exactly but at a 2.055 valve the .25 l/d ratio is .5138 lift and a 2.08 valve is .520 so you should be well past where the valve has a bunch of influence on the flow curves.
I’m a bit bewildered by that curve. Usually at high lifts the 50 and steeper seats don’t do that if the port has the cross section to support it.
Have you put the valve in the guide from the spring side and flowed both ports??