Kroger coupon policy

Not sure how I should have handled this. I had the Reach $1 coupon and tried to buy the floss for $.95. The cashier told me I couldn't use the coupon b/c it was worth more than the item. He called the manager and the manager agreed with the cashier. I didn't argue b/c well I don't want to argue but I don't know if they were right. Does anyone know the Laurel Kroger policy for this?