Hi Matt and welcome
Thank you very much indeed for supporting Couch. I am glad you liked it.
Replying to your questions -
1. I noticed that with the PRO version where I should be able to rebrand it, the tab of the admin page still reads 'CouchCMS'. Is there anyway to change that?
That can be changed by editing the language file in use (default is EN.php). This is found in 'couch/lang' folder. Following are the settings that you'd want to edit
// Admin Panel
$t['admin_panel'] = 'Admin Panel';
$t['login_title'] = 'CouchCMS';
..Is there some way to limit everybody's log in to only edit their page, so that I only have to use one installation of Couch?
I am afraid, no. Atleast not at the moment. Users and access control is pretty basic right now but, as I mentioned elsewhere on this forum, the next version of Couch focuses almost exclusively on rectifying this limitation.