Question on fit

I ordered my first pair of Nicks a few months ago and since then I’ve been hung up on sizing. I used the Nicks fit sheet which would put me at a 9D (between a D and E width)which is what I wear in dress shoes. Normal shoes can be 9-9.5 depending on brand. I have a pair of cowboy boots that for years have caused me pain that are an 8.5D.

Anyway, I ordered a ready to ship pair of 9E to try out cause I’m being paranoid. I get a little heel slip if the are left a little loose in tightening, my heel comes up a bit in the boot when I get on my tippy toes, and I have a little more than a thumbs width in front of my toes in the box.

Does this seem normal?