Spammage:
BEWARE the 8-iron - darn thing has a mind of it's own.
That is very true, by far the most unpredictable club in the set. The rest are great though and even the 8 iron isn't sooooo bad. A result like the OP reported sounds like some sort of screw up.
To quote from the Official WGT Book of Simple Cures: Be sure to clear your flash cache every time you buy new gear and put it in your bag.
You can either clear everything in which case you'll lose any data saved for other flash games or just select media5wgt and delete that. You'll have to reset all your game settings but it's worth the small amount of work involved. I do mine about once a week and after every update or change of gear.