Why would this nhibernate criteria query produce the sql query below?

return Session.CreateCriteria(typeof(FundingCategory), "fc")
    .CreateCriteria("FundingPrograms", "fp")
    .CreateCriteria("Projects", "p", JoinType.LeftOuterJoin)
    .Add(Restrictions.Disjunction()
        .Add(Restrictions.Eq("fp.Recipient.Id", recipientId))
        .Add(Restrictions.Eq("p.Recipient.Id", recipientId))
    )
    .SetProjection(Projections.ProjectionList()
        .Add(Projections.GroupProperty("fc.Name"), "fcn")
        .Add(Projections.Sum("fp.ObligatedAmount"), "fpo")
        .Add(Projections.Sum("p.ObligatedAmount"), "po")
    )
    .AddOrder(Order.Desc("fpo"))
    .AddOrder(Order.Desc("po"))
    .AddOrder(Order.Asc("fcn"))
    .List<object[]>();

SELECT   this_.Name                as y0_,
         sum(fp1_.ObligatedAmount) as y1_,
         sum(p2_.ObligatedAmount)  as y2_
FROM     fundingCategories this_
         inner join fundingPrograms fp1_
           on this_.fundingCategoryId = fp1_.fundingCategoryId
         left outer join projects p2_
           on fp1_.fundingProgramId = p2_.fundingProgramId
WHERE    (fp1_.recipientId = 6 /* @p0 */
           or p2_.recipientId = 6 /* @p1 */)
GROUP BY this_.Name
ORDER BY p2_.name asc,
         y1_ desc,
         y2_ desc,
         y0_ asc

It is incorrectly putting the p2_name asc into the ORDER BY statement, and causing it to crash. This only happens when I use JoinType.LeftOuterJoin on my Projects criteria. Is this a known nhibernate bug? I'm using nhibernate 2.0.1.4000. Thanks for any insight.