Are you running latest versions of WordPress, ACF and ACF Repeater?
I did a short screencast replicating your setup, in Chrome: https://cloudup.com/i40qPzswRh1
As Elliot said those settings are purely visual, and will not be saved in the database, meaning you can’t show them in the front-end.
What you can do it code the prepend in your theme, since you know where it’s supposed to be. Simply create something along the lines of:
<?php if (get_field ('textbook_title') ) : ?>
<p>Title: <?php echo the_field ('textbook_title'); ?></p>
<?php endif; ?>
I tested this and I can’t seem to replicate the issue.
I have a field group with various fields scattered across three tabs.
I created a repeater field (plus a test-sub field) on the 2nd tab.
I went out and pressed “Add row”, and I’m still on the same tab. Although there is no focus on the sub field, I’m not taken away from the tab the repeater is on.
This was tested on the latest stable version (4.3.4).
Is it still a problem in ACF 4.3.4?
One of the bugs fixed in the new version reads:
“Post Object field: Fixed get_pages bug cuasing ‘pages’ to not appear”