Forum subscriptions and post box problem

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A member on my site sent me a picture of a problem he is having which I attached to this thread. As you can see his posts are showing up at the very bottom of the post box and he is the only person who seems to be having this problem. Is it a setting he can change or is it something I need to do in the admin cp?

This same user is not getting consistent notifications from subscriptions. He subscribed to one of my threads and does not receive email notification even though he requested it. He is emailed when his other subscriptions have new posts.

Also, is there any way for me to automatically subscribe members to threads after they've posted? I'd like to have it selected for them to be emailed when a new post it made but I can't seem to find it in the admin cp.

TIA