AWS CDN: CDN debug info: Engine: cf2

I recently installed AWS cloudfront (with bluehost as my host) and used W3TC to set it up, however, there has been significant slow load times (test: seoulsync.com
with: https://tools.pingdom.com/fpt/ )
particularly with wait times with https://www.seoulsync.com and seoulsync.com

I checked the page source and found this:

<!– W3 Total Cache: CDN debug info:
Engine: cf2

Replaced URLs:
https://www.seoulsync.com/wp-content/uploads/2014/03/SEOULSYNC-logo.png => https://cdn.seoulsync.com/wp-content/uploads/2014/03/SEOULSYNC-logo.png

and a long list of other replaced URLs

Would anyone know how I can resolve this issue?

Thank you!

https://www.ads-software.com/plugins/w3-total-cache/