Combining multiple CMU BVH files

I have downloaded the CMU BVH files and would like to combine a few to make an animation and have run into a brick wall.

I have imported 2 of the BVH’s and made a single action using the NLA editor but when I play it where the second action starts the character jumps to another location in the scene (which is where the second BVH started to begin with)

Is there a way to have the first frame of the second file start where the first one left off?