I can finally confirm that the storage issues are resolved and it turned out not to be the Zonbu/S3 service, but rather some transparent network proxying on my end.
I want to say thanks to the Zonbu support team that worked with me on this.
In the process we discovered a few improvements that can be made, and also, I think opened a few eyes as to the various transparent things broadband operators do to optimize their networks.
-Mr. Zonbu