Configurable RSS feeds

Preface: this may be something that I am just not doing correctly. 

 

I would like to be able to configure both the sort order and number of articles returned when offering RSS feeds for an entire server. Right now it appears that every result is returned, and results are returned sorted by project and then by date instead of by date only. This makes it difficult to aggregate the results from several servers into one location in a reasonable order, e.g. in a discussion forum. 

Maybe this is supposed to be handled by the feed reader. I'm using a 'dumb' reader that just takes every article and turns it into a forum post, and it's posting things in the aforementioned order.