So I took a minute to internalize and process some of the underrated and overrated @closetojumping were discussing.
I started with the basic reality that Coaches polls, as I understand, have always been shooting from the hip sort of deal. These coaches or whoever is filling in the votes are in the middle of summer camp and the last thing they give a shit about is ranking teams much less looking at depth charts or schedules.
So, they are going to vote on the things they know, historicals and sometimes for or against certain teams given bias or favoritism toward or against teams in their conference or for other reasons. See the voters in spoiler below, their teams and these biases will start to solidify.
Big XII 6 voters B1G 9 voters SEC 8 voters ACC 7 voters (I own I may have missed some or got them incorrect)
Taking a quick examination of the Arizon State and Indiana University, what you have is 2 historically under performing schools that BOTH lost their most high profile and arguably most productive players to the draft. They aren't names in their conference nor historically. Their coaches are not well known historically either. They both had 1 really good year that caught the attention of the nation. So, knowing those facts, without looking at depth charts nor schedule, I could see it being extremely easy to dismiss them both, throw them somewhere in the top 25 and call it a day. In a interesting similar aspect, while Deboer and Bama are both known, they also lost their starting QB and so that aligns with the logic of them being at the lower end of top 10 in this less than in depth thought process of coach voters.
I'll point out that Washington and Georgia Tech are simply lesser known and as such probably just skipped pushed to the lower end by non-ACC or B1G coaches.