Here is my dilemma:

As part of my own editorial process using the KDP platform, I do proofing runs by emailing the latest downloaded MOBI to my Kindle device (Kindle IOS app). The problem I have, is that there is no apparent way to delete them. I can remove them from my device, except they are still in the cloud. The ones in the cloud I cannot delete using my device app.

In theory, I should be able to log in to my Amazon account, access content and devices, and delete them there, right? Except they don't appear there. Other ebooks appear there, but not the ones I had emailed to my device.

Any ideas?