The placement of Alabama and Auburn in Spokane makes perfect sense.
Further information:
NCAA basketball tournament selection process
The Selection Committee, which includes conference commissioners and university
athletic directors appointed by the NCAA, determines the bracket during the week before the tournament. Since the results of several conference tournaments occurring during the same week can significantly impact the bracket, the Committee often makes several brackets for different results.
To make the bracket, the Committee ranks the whole field from 1 to 68; these are referred to as the
true seed. The committee then divides the teams amongst the four regions, giving each a seed between No. 1 and No. 16. The same four seeds in all the regions are referred to as the
seed line (i.e. the No. 6 seed line). Eight teams are doubled up and compete in the
First Four. Two of the paired teams compete for No. 16 seeds, and the other two paired teams are the last at-large teams awarded bids to the tournament and compete for a seed line in the No. 11 to No. 14 range, which varies year to year based on the true seeds of the teams overall.
[2]
Teams are placed in the closest geographical region to reduce travel time. However, teams are moved to other regions to follow several rules for ensuring competitive balance and avoiding rematches from the regular season in early rounds.[2]
The top four overall seeds are placed as No. 1 seeds in each region. The regions are paired so that if all the No. 1 seeds reached the Final Four true seed No. 1 would play No. 4 and No. 2 would play No. 3. The No. 2 teams are preferably placed so that the No. 5 true seed will not be paired with the No. 1 true seed. The committee ensures competitive balance among the top four seeds in each region by adding the true seed values up and comparing the values among the regions. If there is significant deviation, some teams will be moved among the regions to balance the true seed distribution.
[2]
If a conference has two to four teams in the top four seeds, they will be placed in different regions. Otherwise, teams from the same conference are placed to avoid a rematch before the regional finals if they have played three or more times in the season, the regional semifinals if they have played twice, or the second round if they have played once. Additionally, the committee is advised to avoid rematches from the regular season and the previous years' tournament in the First Four. Finally, the committee will attempt to ensure that a team is not moved out of their preferred geographical region an inordinate number of times based on their placement in the previous two tournaments. To follow these rules and preferences, the committee may move a team off of their expected seed line. Thus, for example, the 40th overall ranked team, originally slated to be a No. 10 seed within a particular region, may instead be moved up to a No. 9 seed or moved down to a No. 11 seed.
[2]