Most of the pre-season magazines had ISU as 2nd behind Houston, not sure where you are seeing 6th.
I don’t recall ever seeing ISU 2nd.
USA Today had them 6th:
USA TODAY Network Big 12 basketball predictions, preseason awards, all-conference teams
We polled reporters within the USA TODAY Network who cover Big 12 schools for their preseason predictions, all-conference teams and preseason awards.
www.usatoday.com
The Athletic had them 6th:
Big 12 men’s basketball preseason rankings: Houston, Arizona and a crowded top 5
Texas Tech, BYU and Kansas all look like legitimate contenders for the Big 12 title as well.
6th here:
Big 12 Preseason Power Rankings for the 2025-26 Season
Can Houston win a title? Is Arizona bound for the Final Four? The Big 12 added new programs last year and the shakeup is just getting started.
5th here:
Houston Tabbed As Big 12 Men’s Basketball Favorite, TTU’s Toppin Named Preseason Player of the Year
Fresh off an appearance in the NCAA Championship game, Houston was picked as the favorite in the Big 12 men’s basketball preseason poll. This is the Cougars’ first time sitting atop the preseason poll, after checking in at No. 2 in each of their first two seasons as part of the Big 12.
big12sports.com