seller central ship by date and deliver by date VS amazon buyer front end shipping times ?

my shipping templates are like 3-4 days i set them too.

but on the buyer front end it shows like 2 weeks delivery time which sucks.

however, when i get orders in SC, the deliver by date is not 2 weeks, they seem to be like 6 days.

So i am confused because the shipping templates seem to contradict the amazon buyer front end which contradicts the Seller Central back end.

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usps has been destroying my FBM business lately causing my delivery times to explode because they have been very delayed and slow. lately, i have switched to ups, which seems to have fixed the issue, but it shows 2 weeks on the buyer side. i hope it resolves soon, as its been nearly 1 week since my delivery times exploded, idk how long it takes to reset. it tanked my sales, but somehow they are recovering slightly.