Delivery Times Changed

Hello guys.

Did anyone noticed the same?

My delivery times has changed even though I still offer Express 3-5 days delivery, however, it is showing now 14-18 days delivery for the same express option. My on time delivery rate is 97.7% for express.

Those who does FBA their delivery times is within 6 days. Even though I am quicker now my delivery times showing 14-18 days thus putting my customers off and they buy from FBA merchants. I guess Amazon deliberately tweaking their algorithm to push their own sales. Amazon constantly approaching me requesting to intrust them my stock for FBA, which I refuse. How can you intrust them all? They own Customers, trying to take control over shipping and fulfillment. You need to be crazy not to see where it all lead to!