Some dimension presets are at an extremely low volume???

I am running through some presets, and miscellaneous ones are at such a low volume that I can barely here them.  I have not altered the presets, and the volume levels on dimension and sonar are high.  This happens to the same presets whether I am in sonar or stand-alone.  Some examples are the grand pianos, but I found some in other folders.  Anyone heard of this one?
Thanks.