Why should they? So teams know where they sit in the minds of the committee. Having information allows coaches/teams become easily motivated for games that help their interests in the March.why should they rank the teams each week? It is meaningless until you see the final record.
Why does the AP/Coaches poll rank teams each week? Is that meaningless until the final record? Those polls have no bearing on what the actual committee who seeds teams places the teams.
An official college basketball committee top 25 would be transparent and would no negatives except Bracketologists would lose TV time and there wouldn't be as much suspense on Selection Sunday.