It's a known bug, workaround here http://forum.baldursgate.com/discussion/24795/hotfixes-workarounds-and-how-to-activate-the-console/p1 (View Post)

Spike Trap is currently bugged and you can set only one per area as a bard. (View Post)

Mace for mace of disruption and the stunning mace in BG1. (View Post)

While CF is certainly a great weapon esp. a solo cleric will not be getting as much mileage out of it as e.g. a fighter - you'll drown in DUHM and will be able to run with maxxed physical stats for a… (View Post)

As far as I remember the stunning mace is easier to get than the warhammer from Bassilus so I'd start with that. I might be wrong though, haven't played BG1 as often as 2. (View Post)