I am the book author and I have access to KDP and can preview my internal texts from there. I have checked and double checked the internal version did indeed update to fix typo and a program (for arduino) fixed where it had two LARGE errors. The program would crash and not work. So this is definitely a major edit in my point of view.
Now I am completely lost here. I tried to push the correct version live to my book. It looks like it passed the review progress. Not to mention preview from KDP website shows the correct version. I only have one copy of that book listed in KDP.
For some strange reasons two of my books on my dad's android kindle copy still shows the old outdated version. I tried to follow the link to "manage content and devices on amazon website" for my dad's account. It doesn't show anything about updating my old book? All it does is give me option to turn on/off automatic book updating. I tried deleting and re-download that didn't do anything.
The link article below didn't help with my issue.
What I would like to know is there an easy way to "force" all digital book to update to the newer revision edition without contacting support? I am asking mainly because it seem that the normal way of doing it doesn't even fix the outdated edition.