Culver's review: Listed prices

At my local Culvers, I find the price listed online is considerably different from what they charge at the drive-up, yet they were supposedly up-to — date as of Sept. '22. This is annoying, so what's going on here?

Culvers # 351 dated 10/8/22 Price was listed at about $4.19/$.29 online, but was over $5 (w/ senior discount) at the store. I no longer have the receipt. I have run into this situation before.