[Edit: Issues, Bugs, and Requested Features should be tracked at Google Code, not here -- matt, 2010-04-23]
Less Wrong is still under construction. Please post any bugs or issues with Less Wrong to this thread. Try to keep each comment thread a clean discussion of each bug or issue.
Requested features... sure, go ahead, but bear in mind we may not be able to implement for a while.
I do not observe this phenomenon, although I note that I cannot change the sort away from "Old".
I have my preferences set to "Display 20 comments by default". I think it's using one sorting method for the first 20 and a different sorting method for the ones that appear after I click "load more comments".