Dear Mark,
As discussed in the following forum topic: BeamDyn versus ElastoDyn - #9 by Jason.Jonkman, we are aware of a bug in how BeamDyn calculates the local sectional loads (forces/moments) that are output. While the internal blade dynamics and deflections are calculated properly by BeamDyn, the local sectional load outputs are not calculated correctly, except at the blade root. We are working on a fix, which will be included in the next release of BeamDyn.
Best regards,