Last time I bought at Joanns i had a problem with their buy one get one free sewing notions. That was a nightmare. I actually thought that if I bought in two's that I would get a "true" buy one get one free. But actually you buy the higher priced item and get lower priced item free. So basically after I checked out and realized what had happened, I returned everything and bought my BOGO items in seperate transactions to get a true Buy one get one free.
And that same day I used my 50% off for a Sidewinder, which was not on sale, so the coupon worked. And I use the 40% and 50% off coupons on rotary blades, mats, batting and sometimes books. Just depends on the ad that month.