It's the same crappy thing with All Conference selections in most conferences. All the politicking, the requirement to "spread out the goodies".
There are many times that guys that play both ways should be all conference on both sides of the ball by any outsiders viewpoint watching the games but they are limited to being all conference on just one side of the hall when the voting happens and lists come out.
Couple examples - Last year in the DVC Max Ihry all conference RB selection but not at LB. Same with Isaiah Robinson. All conference as DB but not at WR. Anyone watching the games last year would pick both for both positions - but that leaves two less spots for other kids and so......