Its kinda of confusing , and imo recent content should be the first thing as not everyone posts as a question , or uses tags for that matter..
the issue this causes.. is if someone comes onto the forum and only answers the recent questions it bumps the content threads down, you only have to look at the times posted on each module to see theres an issue with it
It gives me the brace and bits. Personally, I would get rid of Recent Questions altogether. Increase the number of posts in Recent Content. You already have a "more" button. Plus there are 3 different vaults of past Questions to sift through.
It's just messy in my book at the moment.
Just my own opinion. No doubt there is a cleaner way than mine