Overnight Shipping Dissappeared

Hay it happened to any of you? I had many items ready to buy, some where overnight, other for Wednesday and Thursday of next week. Left the app to answer a call and then ALL of the shipping dates changed to Wednesday, no more over night. I contacted Amazon CS (I know waste of time) and she said she coul see over night items. I went back to the usual items that I buy whi h I know they are overnight and nope?m all Wednesday shipping dates.

I do not have setup Amazon day, could this be a glitch in my account?