Drake also has neutral site wins over Akron and Nevada and a road win at SIU. Their worst loss by NET ranking is at Belmont, who is currently at 161. All 4 of their losses are Quad 3 losses, 3 on the road, one at a neutral site.
The reason that Florida is ranked higher is because all 6 of those losses you mentioned are Quad 1, including a road loss to the Ole Miss team that is 17-3 and currently 57 in NET.
Here are notes about the teams you mentioned:
-Iowa: Best win is a home win over Nebraska, which is currently a Quad 2 win. Have 2 Quad 3 losses, both at home to Michigan and Maryland.
-Northwestern: Have 4 Quad 1 wins, all at home against teams currently within the top 25 of NET. The Chicago State loss is still a Quad 4 loss and will likely be a huge anchor on their NET ranking.
-Ole Miss: Best win was yesterday at #45 Texas A&M. Prior to that was last month at #70 UCF. Worst loss is at #94 LSU.
-Maryland: Currently 3-6 overall in Quad 1 and 2 games (2-4 in Quad 1, 1-2 in Quad 2). Only wins in those quads were the road wins at Illinois and Iowa and home against Nebraska. NET ranking is hindered by neutral court losses early in the season to Davidson and UAB, which are currently Quad 3.