Replying to Boot fitting troubles

So I'm in the market for buying ski boots and I'm having so much trouble trying to find my actual size. I go to a fitter that throws me in a 28.5 since I wear a 10.5 shoe. Then I go to another guy and he measures my foot and I come up as a 26. So he shoves me in a 26 in multiple boots, and my feet were almost numb after 2 min in mostly all of them, especially some full tilts. Then I go to another shop and throw on some 27.5s and my feet are a little cramped but not as worse as in the 26. So I'm assuming some 28s would solve this problem. Long story short, I'm going to another boot fitter tmrw a state over, who's supposed to be top notch. I've never had so much trouble trying to find a damn ski boot to buy. Anyone ever had this much of a hassle?