That’s just how that projection shakes out.

As for RPI, here’s what the NCAA says:

The RPI is intended to be used as one of many resources used by the committee in the selection, seeding and bracketing process. It never should be considered anything but an additional evaluation tool. No computer program that is based on pure numbers can take into account subjective concepts, e.g., how well a team is playing down the stretch, what the loss or return of a top player means to a team, or how emotional a specific conference game may be.

Several independent elements are combined to produce the RPI. These elements are a part of the statistical information that can be utilized by each member in an objective manner.

Each committee member independently evaluates a vast pool of information available during the process to develop individual preferences. It is these subjective opinions—developed after many hours of personal observations, discussion with coaches, directors of athletics and commissioners, and review and comparison of objective data—that dictate how each individual ultimately will vote on all issues related to the selection, seeding and bracketing process.

While the various elements of the RPI are important in the evaluation process, the tournament bracket each year is based on the subjectivity of each individual committee member to select the best at-large teams available and to create a nationally balanced championship.