Yes, current Settings:
controllers.xboxdrv.enabled=1
controllers.xboxdrv.nbcontrols=2
I think it´s because controls is set to two.
Edit, I changed it to one, new results:
cat /proc/bus/input/devices
I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="Xbox Gamepad (userspace driver)"
P: Phys=
S: Sysfs=/devices/virtual/input/input0
U: Uniq=
H: Handlers=js0 event0
B: PROP=0
B: EV=b
B: KEY=7fdb0000 0 0 0 0 0 0 0 0 0
B: ABS=3001b
Ah forget it!, with Nothing connected, the same results are displayed
So it does not matter if the arcade stick is plugged in or not apparently..
I normally play with a wireless X360 controller (using a 3rd party dongle), I use the same Arcade Stick but with Cronus Max talking in X360 language.