I'm sure that Ultrabeat has a bug in the sample of Osc 2.When you drag the sample in from the Bin...
I know some people don't use Ultrabeat but I quite like it.There's something funny going on with the layering of the velocities too.The graphical bar at the side showing the layers does not allow you to set the velocity min and max.
I could be wrong but I like being enlightened too !