They probably had a bunch of 350's in stock and figured you for an easy mark. I've been told that some places do stuff like that and it's just wrong. Eve nif it was last year you should still say something to them about it.

And if they tell you those are the right arrows I'd start telling everyone you know in that area that the place doesn't know how to size arrows.It's a matter of principle more than getting a refund or the correct shafts from them. They took advantage of your lack of knowledge on a subject. Imagine how many other people they must do that to. It's just not right and bad business.

By the way. I'm glad to see that you provided most of what is needed for a simulation.