Default Category Settings & Redirect on login

Hello,

I am using EasyBlog to allow teachers at a preschool to create blog posts about what happened during a particular school day so that parents can read the blog and be informed. I am using EasyBlog category subscriptions that I set up on the backend in the database and the core Joomla user and groups settings to ensure that parents only have access to the main school blog and the blog for their child's classroom. There are 4 blogs, one for each of the 3 classes and one for the entire school.

I would like for each teacher to be restricted to posting to only their blog and I am using the privacy settings on the permissions tab in each category to do this. However, when I go into the privacy settings for the default category which is the blog category for the entire school I am not allowed to assign permissions by Joomla group. I get the error "Unable to save this category because it is default category and not public." Is there a way to set the default category by blogger? Without this feature, I have to rely on the teachers remembering to switch the category before posting which they don't always remember to do and the blogs end up going to the wrong subscibers.

Another issue I am having is with the redirect after login. I have a Joomla redirect set for anyone who goes to the website and logs in to be redirected to the main school blog. However, when a subscriber receives an email notification with a truncated blog post and clicks the "read full post" link in the email they are required to login as expected but they are then taken to the main school blog instead of the new blog post they clicked the link to read. Is there a way to control the redirect so that the reader is taken to the blog post the "read full post" link is associated with after logging in. At the moment the only way that they get redirected to the correct post is if they are logged in before clicking the "read full post" link.

Thanks,
Joye