North Carolina seemed to be NET Top 10 most of the season, but the committee never included them in the Top 16 in any of their 3 reveals, even after they'd beaten a top seed like Louisville. I guess some of their other numbers didn't impress the committee.
Conversely, the committee just seemed to love Oklahoma even though they were never ranked in NET Top 20, IIRC. Charlie Creme would point out that OU had several NET Top 25 wins (or something to that effect).
So, seems like UNC and OU were some of the more confusing non-hosts / host as it turned out.
Arizona seemed to do everything in its power down the stretch to have the committee push them out of hosting; but, the committee kept them in (probably because of their early season win over Louisville).