FCS Polls Week 2 USD has lost both their games so far and Drake has 1 win by a 45-3 score (though not a powerhouse at all). This could have influenced the disparity in the voting for the rankings.
Also, USD does offer football schollies- this from their website:
"This is the University Of San Diego (California) Football scholarship and program information page. Here you can explore important information about University Of San Diego Football. This information is very valuable for all high school student-athletes to understand as they start the recruiting process. University Of San Diego is located in San Diego, CA and the Football program competes in the Pioneer Football League conference.
University Of San Diego does offer athletic scholarships for Football. Need-based and academic scholarships are available for student-athletes. Athletic scholarships are available for NCAA Division I, NCAA Division II, NAIA and NJCAA. On average, 34% of all student-athletes receive athletic scholarships.
If you are interested in getting recruited by University Of San Diego Football, you should get to know more about the school, what academic programs are offered, and important members of the coaching staff - these are the people you need to connect with. Getting familiar with the Football program is an important first step in the recruiting process.