The RSS limit should be 150, so it is odd you are seeing it cut out at 12. I just tested 15, and it seemed to work.
The Self programming scripts can call out to functions exposed on the bots Senses, and Tools. I would like to add an RSS feed Sense, so that it can pull in any RSS feed URL. So you would just need to expose the database data as an RSS feed. Other formats could be supported, or perhaps some sort of generic REST API Sense.
I am working on dates and times, should be released soon.
Any relationship has a correctness (from -1 to +1), the more a relationship is reinforced the more its correctness, so there is some support for this already.