Two cents: Minions don't get opposed checks against the force unless it's in the power description. They're minions, and the opposed roll rules only specify PCs and Nemesis NPCs, occasionally important named Rivals.
Also the auto fire rules are for using multiple objects to make an attack, which disarming them is not. If they have the necessary Control upgrade and Magnitude and enough points to activate them, and are in the correct range, they should succeed
Disarming itself is not in the force powers description and the power itself speaks from slow movement and the ability to pull something out of secure mountings not someone's hands. You might argue here that the resilience check is not for resisting the force power, but instead for keeping hold to the weapon itself, Which means that there is no opposed check, but instead two separated, not directly related checks. The minions simply can still shoot if their check is successful while getting slowly pulled in whatever direction the force user wants.
But now we are into GM interpretation and rules lawyering territory.
Though I must admit that order has some appeal as it selfs the issue of assigning two different difficulties, etc … and on a failed check it allows even to run/jump after your floating gun, and still shoot with it while running next turn …