[Tarana]

Now that I finally understand (after years) how Kindle Collections works and only have two other family members linked to my account, I want to fix my Collections.

When I look at Collections, there are multiples of categories (i.e. Scifi, Scifi and Fantasy, Fantasy and Sci fi) mostly because these were set up on kindles instead of online. How can I sort this out so that I only have two categories (Science Fiction, Fantasy)? The easy way I thought would be to delete all the categories and start from scratch, but how do I do that with the cloud categories? Is there a 'delete all' button somewhere?

The second question is how to get the categories on ereaders? The instructions I see is for a newly freshly formatted unit. Do I need to do that to get them there?