Just a couple of notes.
First, you aren't addressing Adobe when posting on these forums. They are user to user forums that Adobe provides.
Second, the Kindle plug-in is written and provided by Amazon. Worse, it has never been out of beta.They do update kindlegen.exe that the plug-in uses once in a while. Depending upon the version you are using, there could be a more current version of kindlegen.exe available from Amazon's web site. Do note that these updates sometimes fix one thing and break another.
Mike