Yes to all that. These calipers seem to have a design that allows them to move within the bracket. At least that is what I have reasoned.Did you have the calliper fully bolted up during that? It gives a fair bit with the disc wobble. The inboard drive sprocket has a fair bit of eccentricity too. There's many a time I've tried to make my own alignment on sprockets and I know it's a tough old ask to get 100% when you haven't got that perfectly lathe machined piece to make it happen.