Delivery date is different than my shipping settings

Hi,

For all my products, the delivery dates on the product pages are different than my shipping settings.

My transit time is 10-14 days and my handling time is 2 days for all my products. With weekends My delivery dates should be max 13- 17 days. However, delivery dates on my product pages are 22-28 days. When I make a sale, I saw 13-17 days on my selling account again. I lose too many sales because of this difference. My delivery dates are the latest compared to other sellers and customers choose them.

How can I fix this issue.