Issues I'm having with Calibre 8.0.1

[npr]

I'm having the following teething problems with Calibre 8.0.1, Are these issues or have I got it wrong?

1) The following is added to every htm file whether hypenation is enabled or not in the driver.
I assume this is enabling hyphenation in the book even though I don't want this.

Spoiler:

<style type="text/css" id="kobostylehacks">div#book-inner { margin-top: 0; margin-bottom: 0; }


* {
/* Vendor-prefixed CSS properties for hyphenation. Keep -webkit first since
* some user agents also recognize -webkit properties and will apply them.
*/
-webkit-hyphens: auto;
-webkit-hyphenate-limit-after: 3;
-webkit-hyphenate-limit-before: 2;
-webkit-hyphenate-limit-chars: 6 2 3;
-webkit-hyphenate-limit-lines: 3;

/* CSS4 standard properties for hyphenation. If a property isn't represented
* in the standard, don't put a vendor-prefixed property for it above.
*/
hyphens: auto;
hyphenate-limit-chars: 6 2 3;
hyphenate-limit-lines: 3;
hyphenate-limit-last: page;
}

h1, h2, h3, h4, h5, h6, td {
-webkit-hyphens: none !important;
hyphens: none !important;
}
</style>
<script type="text/javascript" src="../kobo.js"/>

Update:
Need to also disable hyphenation in Preferences > Output options > Kepub output > remove tick Enable / disable hyphenation for this book.
Should the settings in the driver automatically change this setting?

2) Modify CSS model specific is not working. The css rules I've entered against a Libra 2 are not being transferred to my kobo Libra2. Note, Kobo Utilities appears to be identifying the Libra2 correctly.

3) epub book sent to the ereader as kepubs are also being saved in the library as kepub.

[kovidgoyal]

You presuably have EPUB disabled as one of the formats to send to your kobo. Your sympotms are all caused by calibre converting the EPUB to kepub first. Re-enable the epub format and you will be fine. the driver will then send the epubs as kepubs and no copies will be in your library and the setting in the driver will apply rather than the setting in conversion.

[npr]

I assume that's in customise kobotouch > file format:
kepub and epub have always been ticked.
I've changed the order to epub first but that's made no difference.

Provided I have hyphenation disabled in kepub output the book is as I want.

[kovidgoyal]

I dont see how calibre could be converting to kepub in any other way, I certainly cant get it to do that without unticking EPUB.

[npr]

Found the problem:
Down arrow on send to device was default set to "send specific format to main memory"
Changed to "send to main memory"
That fixed all three issues.