about 2 weeks ago, we moved an entire category of our most heavily-trafficked pages using a permanent redirect into a new subdomain that we're promoting. This content had plenty of backlinks.

it's understandable that traffic from the main site will drop equal to the new traffic into the subdomain from the implemented redirects, but now our rankings are effected.

on the main site, rankings are going down for pages other than what we moved to the subdomain. could this be because the site now has less clickthrus?

In addition, on the moved content is now getting less traffic than it did on the main site, even though all permanent redirects are in place. could this be because the backlinks all point to the main site and it will take a while for the search engines to revisit those backlinks and credit the new subdomain (instead of the old main site?)