d........s

I usually go inside but today I signed up for pickup. Online I ordered 8 bags of gummys.. They were 13.60 a bag. When I went to pick up I didn't double check because service has been 2nd to none. When I got home I only had 5 bags of gummys and was charged 17.10 a bag. So the dollar amount was not far off because of taxes I assumed. I called and the nice gentleman that took care of me answered the phone. I told him what happened and he told me that sale went off he thought. It was online at that price but not there. Why does this happen? Thank you! Danny