There are duplicate calls to hciattach in /etc/pcmcia/bluetooth and /etc/init.d/bluetooth (both from net-wireless/bluez-utils). When a serial-based Bluetooth PCMCIA card is inserted, triggering the start of the bluetooth service, hciattach will be called by both scripts. This is undesirable behaviour.
I don't own a Bluetooth PCMCIA card so I can't test this. Will removing start_uarts and stop_uarts from /etc/init.d/bluetooth fix this issue? Or will this create a failure when booting with the PCMCIA card already inserted? Could you please tell us what version of bluez you are using?
hciattach is now handled in /lib/udev/bluetooth_serial and the init script does not call hciattach any more. bluez-utils does not install /etc/pcmcia/bluetooth file any more in 3.10.1. You should delete this file.