I hope it isn't a problem any more but some of the shops used to be terrible at setting up boards. Between getting a board mounted by a shop once or twice when I started or teaching 10 years ago I've seen some horrific setups.
Their feet only 1 foot a part it seemed on some(as if they drilled extra fucking holes to make the stance even shadier) Or both feet pointing forward massively like a slalom board on a standard board.
Hopefully that's changed and peoples bad setups are their own faults but who knows. Hell there are still mountains that have leash laws to ride the lift.