Ll It is the same as how it works now. The queue puts you in a party for a few seconds, then moves you to the next, then the next and so on until one if finally filled and pops. As the system is now it wouldn't have two pop at once. Really it is the same as now except multiple jobs.
Edit: Another user posted almost the same thing above, sorry to double post it.. But I am confused why you think two duties would pop at once with how DF works.
