Well, that is actually doubly weird, because:
1. SOTT articles do not use <p> tags, which is what you are seeing, escaped several times
2. all HTML tags are stripped when the RSS feed is generated anyway, so they're should be any <p> tags in there even if they did somehow slip by
So, the only thing I can suggest is posting back here with a specific article that has this problem in the RSS feed, and we'll see if anybody else sees the same thing.
At least that way, we can check to make sure there isn't a bug on our end.