EPUB problem - iBooks questions

Hi
New to ePub Creation. Newbie Sigil user. I am new to this forum and could not find a general epub creation QnA section, for sigil epub creation. Hope this is correct place.

1) Contents showing on device TOC
In iBooks device TOC, the "Contents" page is not listed in device TOC. What is controlling this?

In ADE device TOC, the "Contents" page is listed in the device TOC correctly.

2) iBooks for some epubs has option tap to show number of pages ebook, tap to show number of pages Apple iBooks

What is controlling this feature?

Thankyou kindly for your time