Occasionally I had spoilers deploy automatically after I had unbound the speedbrake and thrustreverse axis each, but only for once. I hadn't pushed the "armed" autobrake button, since I didn't know that was possible back then.
Glad you guys have the time to figure this all out. I have no reverser on my thrust axis, maybe that's a problem, that I activate it by a button that i hold.
I was not able to have the spoilers deploy automatically yet on my X52 Joystick.